You want to merge values for combobox. Some are hardcoded into combo but are pulled from database. If so, you need to added the hardcoded values into datasource before binding to combo.
after following lines ADD THE CODE GIVEN BELOW.
adoAAda.Fill(adoAddtRs)
Dim tableAddt As DataTable = adoAddtRs.Tables(0)
'ADD YOUR HARD CODED NAMES TO DATASOURCE BEFORE BINDING
Dim tableAddt As DataTable = adoAddtRs.Tables(0)
Dim dr As DataRow = tableAddt.NewRow
dr("NamesWithJ") = "My test 1"
tableAddt.Rows.Add(dr)
Dim dr1 As DataRow = tableAddt.NewRow
dr("NamesWithJ") = "My test 2"
tableAddt.Rows.Add(dr1)