here's how I promote all worksheet names to global names. YMMV
For Each wsh In ActiveWorkbook.Worksheets
For Each n In wsh.Names
' Get unqualified range name
Dim s As String
s = Split(n.Name, "!")(UBound(Split(n.Name, "!")))
' Add to "Workbook" scope
n.RefersToRange.Name = s
' Remove from "Worksheet" scope
Call n.Delete
Next n
Next wsh