Hi Crusty,
In Germany Ingo is a short form for names beginning with Ingo:
Ingobald (dedicated to the god
Ing + bold, courageous)
Ingobert (dedicated to the god
Ing + shining, bright)
Ingold (dedicated to the god
Ing + rule)
Ingolf (dedicated to the god
Ing + wolf)
Ingomar (dedicated to the god
Ing + famous)
etc.
Regards,
Satu