Insert Data into MDS Entity from User Input programatically (MDS API)

I am trying to create entity member with the "EntityMemberCreate" function but it only create a record with Member name and the attributes columns remain empty. Can anyone tell me how to insert data in entity along with member name. I am passing user's input to this function as parametes.  Here is the code I am using:

private static void CreateEntityMember(string modelName, string versionName, string entityName, string aNewMemberName, string aNewCode, MemberType memberType, string HierarchyName, string PersonName, string FatherName)
        {
            // Create the request object for entity creation.
            EntityMembersCreateRequest createRequest = new EntityMembersCreateRequest();
            createRequest.Members = new EntityMembers();
            createRequest.ReturnCreatedIdentifiers = true;
            // Set the modelId, versionId, and entityId.
            createRequest.Members.ModelId = new Identifier { Name = modelName };
            createRequest.Members.VersionId = new Identifier { Name = versionName };
            createRequest.Members.EntityId = new Identifier { Name = entityName };
            createRequest.Members.MemberType = memberType;
            createRequest.Members.Members = new System.Collections.ObjectModel.Collection<Member> { };
            Member aNewMember = new Member();
            aNewMember.MemberId = new MemberIdentifier() { Name = aNewMemberName, Code = aNewCode, MemberType = memberType };
            createRequest.Members.Members.Add(aNewMember);
            // Create a new entity member
            EntityMembersCreateResponse createResponse = clientProxy.EntityMembersCreate(createRequest);

            HandleOperationErrors(createResponse.OperationResult);

        }

It will create a member in database with NULL attributes i.e: PersonName, FatherName as they were not set in the Member setting option.

Can anybody tell me how to create members with these NULL attributes filled.