diff --git a/src/Morphir/Snowpark/AccessElementMapping.elm b/src/Morphir/Snowpark/AccessElementMapping.elm
index 2d1afc270..bc644e20c 100644
--- a/src/Morphir/Snowpark/AccessElementMapping.elm
+++ b/src/Morphir/Snowpark/AccessElementMapping.elm
@@ -26,6 +26,7 @@ import Morphir.Snowpark.ReferenceUtils exposing (isValueReferenceToSimpleTypesRe
 import Morphir.IR.Value as Value
 import Morphir.Snowpark.MappingContext exposing (isAnonymousRecordWithSimpleTypes)
 import Morphir.Snowpark.Constants exposing (applySnowparkFunc)
+import Morphir.Snowpark.MappingContext exposing (isUnionTypeWithParams)
 
 mapFieldAccess : va -> (Value ta (IrType.Type ())) -> Name.Name -> ValueMappingContext -> Scala.Value
 mapFieldAccess _ value name ctx =
@@ -63,7 +64,11 @@ mapConstructorAccess tpe name ctx =
         (IrType.Reference _ typeName _, _) ->
             if isUnionTypeWithoutParams typeName ctx.typesContextInfo then
                 scalaReferenceToUnionTypeCase typeName name
-            else 
+            else if isUnionTypeWithParams typeName ctx.typesContextInfo then
+                applySnowparkFunc "object_construct" [
+                        applySnowparkFunc "lit" [Scala.Literal <| Scala.StringLit "__tag"], 
+                        applySnowparkFunc "lit" [Scala.Literal <| Scala.StringLit (name |> FQName.getLocalName |> Name.toTitleCase)] ]
+            else
                 Scala.Literal (Scala.StringLit "Constructor access not converted")
         _ -> 
             Scala.Literal (Scala.StringLit "Constructor access not converted")
diff --git a/src/Morphir/Snowpark/Backend.elm b/src/Morphir/Snowpark/Backend.elm
index 379fc3078..718c394fe 100644
--- a/src/Morphir/Snowpark/Backend.elm
+++ b/src/Morphir/Snowpark/Backend.elm
@@ -2,6 +2,7 @@ module Morphir.Snowpark.Backend exposing (..)
 
 import Dict
 import List
+import Set as Set
 import Morphir.File.FileMap exposing (FileMap)
 import Morphir.IR.AccessControlled exposing (Access(..), AccessControlled)
 import Morphir.IR.Distribution as Distribution exposing (..)
@@ -33,6 +34,8 @@ import Morphir.Snowpark.MappingContext exposing (ValueMappingContext)
 import Morphir.Snowpark.MapFunctionsMapping as MapFunctionsMapping
 import Morphir.Snowpark.PatternMatchMapping exposing (mapPatternMatch)
 import Morphir.Snowpark.Constants as Constants
+import Morphir.Scala.Common exposing (scalaKeywords)
+import Morphir.Scala.Common exposing (javaObjectMethods)
 
 type alias Options =
     {}
@@ -178,7 +181,18 @@ generateLocalVariableForRowRecord ctx (name, _, tpe) =
     
 generateArgumentDeclarationForFunction : MappingContextInfo () -> ( Name.Name, Type (), Type () ) -> List Scala.ArgDecl
 generateArgumentDeclarationForFunction ctx (name, _, tpe) =
-    [Scala.ArgDecl [] (mapTypeReference tpe ctx) (name |> Name.toCamelCase) Nothing]
+    [Scala.ArgDecl [] (mapTypeReference tpe ctx) (name |> generateParameterName) Nothing]
+
+generateParameterName : Name.Name -> String
+generateParameterName name =
+    let
+       scalaName = name |> Name.toCamelCase
+    in
+    if Set.member scalaName scalaKeywords || Set.member scalaName javaObjectMethods then
+        "_" ++ scalaName
+    else
+        scalaName
+
 
 processParameters : List ( Name.Name, Type (), Type () ) -> MappingContextInfo () -> (List (List Scala.ArgDecl), List (Scala.MemberDecl) )
 processParameters inputTypes ctx =
diff --git a/src/Morphir/Snowpark/MapFunctionsMapping.elm b/src/Morphir/Snowpark/MapFunctionsMapping.elm
index db04de854..bc10395b8 100644
--- a/src/Morphir/Snowpark/MapFunctionsMapping.elm
+++ b/src/Morphir/Snowpark/MapFunctionsMapping.elm
@@ -128,10 +128,22 @@ tryToConvertUserFunctionCall (func, args) mapValue ctx =
                 case argsToUse of
                     [] -> 
                         funcReference
-                    _ -> 
-                        Scala.Apply funcReference argsToUse
+                    (first::rest) -> 
+                        List.foldr (\a c -> Scala.Apply c [a]) (Scala.Apply funcReference [first]) rest
             else
                 Scala.Literal (Scala.StringLit "Call not converted")
+       ValueIR.Constructor _ constructorName ->
+            if isLocalFunctionName constructorName ctx && List.length args > 0 then
+                let
+                    argsToUse =
+                         args 
+                              |> List.indexedMap (\i arg -> ("field" ++ (String.fromInt i), mapValue arg ctx))
+                              |> List.concatMap (\(field, value) -> [Constants.applySnowparkFunc "lit" [Scala.Literal (Scala.StringLit field), value]])
+                    tag = [ Constants.applySnowparkFunc "lit" [Scala.Literal (Scala.StringLit "__tag")],
+                            Constants.applySnowparkFunc "lit" [ Scala.Literal (Scala.StringLit <| ( constructorName |> FQName.getLocalName |> Name.toTitleCase))]]
+                in Constants.applySnowparkFunc "object_construct" (tag ++ argsToUse)
+            else
+                Scala.Literal (Scala.StringLit "Constructor call not converted")
        _ -> 
             Scala.Literal (Scala.StringLit "Call not converted")
 
diff --git a/src/Morphir/Snowpark/PatternMatchMapping.elm b/src/Morphir/Snowpark/PatternMatchMapping.elm
index 347f7b33f..7778d2b51 100644
--- a/src/Morphir/Snowpark/PatternMatchMapping.elm
+++ b/src/Morphir/Snowpark/PatternMatchMapping.elm
@@ -71,7 +71,7 @@ mapPatternMatch (tpe, expr, cases) mapValue ctx =
                 referenceExpr = mapValue expr ctx
                 compareWithExpr : Name.Name -> Scala.Value
                 compareWithExpr = \name -> 
-                                   equalExpr (Scala.Apply referenceExpr [Scala.ArgValue Nothing (applySnowparkFunc "lit" [Scala.Literal (Scala.StringLit "__tag")])])
+                                   equalExpr (Scala.Apply referenceExpr [Scala.ArgValue Nothing (Scala.Literal (Scala.StringLit "__tag"))])
                                              (applySnowparkFunc "lit" [Scala.Literal (Scala.StringLit (Name.toTitleCase name))])
                 changeCtxt = addBindingReplacementsToContext ctx 
                 restPairs = rest |> List.map (\(constr, bindings, val) -> ((compareWithExpr constr), (mapValue val (changeCtxt bindings referenceExpr))))
@@ -81,7 +81,7 @@ mapPatternMatch (tpe, expr, cases) mapValue ctx =
             let
                 referenceExpr = mapValue expr ctx
                 compareWithExpr = \name -> 
-                                   equalExpr (Scala.Apply (mapValue expr ctx) [Scala.ArgValue Nothing (applySnowparkFunc "lit" [Scala.Literal (Scala.StringLit "__tag")])])
+                                   equalExpr (Scala.Apply (mapValue expr ctx) [Scala.ArgValue Nothing (Scala.Literal (Scala.StringLit "__tag"))])
                                              (applySnowparkFunc "lit" [Scala.Literal (Scala.StringLit ( Name.toTitleCase name))])
                 changeCtxt = addBindingReplacementsToContext ctx 
                 restPairs = rest |> List.map (\(constr, bindings, val) -> ((compareWithExpr constr), (mapValue val (changeCtxt bindings referenceExpr))))
@@ -98,16 +98,16 @@ mapPatternMatch (tpe, expr, cases) mapValue ctx =
         _ ->
             Scala.Variable "NOT_CONVERTED"
 
-generateBindingVariableExpr : Name.Name -> Scala.Value -> Scala.Value
+generateBindingVariableExpr : String -> Scala.Value -> Scala.Value
 generateBindingVariableExpr name expr =
-    Scala.Apply expr [Scala.ArgValue Nothing (applySnowparkFunc "lit" [Scala.Literal (Scala.StringLit (name |> Name.toCamelCase))])]
+    Scala.Apply expr [Scala.ArgValue Nothing (Scala.Literal (Scala.StringLit name))]
 
 addBindingReplacementsToContext : ValueMappingContext -> List Name.Name -> Scala.Value -> ValueMappingContext
 addBindingReplacementsToContext ctxt bindingVariables referenceExpr =
     let 
         newReplacements = 
             bindingVariables
-                |> List.map (\name -> (name, generateBindingVariableExpr name referenceExpr))
+                |> List.indexedMap (\i name -> (name, generateBindingVariableExpr ("field" ++ (String.fromInt i)) referenceExpr))
                 |> Dict.fromList
     in
     { ctxt | inlinedIds  = Dict.union ctxt.inlinedIds newReplacements }