Попробуйте эту небольшую пользовательскую функцию:
Public Function PeopleKounter(s As String) As Long Dim DQ As String, c As Collection Set c = New Collection DQ = Chr(34) ary = Split(Replace(s, DQ, ""), ",") On Error Resume Next For Each a In ary c.Add a, CStr(a) Next a On Error GoTo 0 PeopleKounter = c.Count End Function