Ingo

German masculine form of INGE.

INGE   female & male   Danish, Norwegian, Swedish, German, Dutch
Short form of Scandinavian and German names beginning with the element ing, which refers to the Germanic god ING. In Sweden and Norway this is primarily a masculine name, elsewhere it is usually feminine.
ING   male   Germanic Mythology
From the Germanic *Ingwaz, possibly meaning "ancestor". This was the name of an obscure old Germanic fertility god who was considered the ancestor of the tribe the Ingaevones. It is possible he was an earlier incarnation of the god Freyr.
FULL FORMS
ANCIENT GERMANIC: Ingomar, Ingulf
GERMAN: Ingolf, Ingomar
EQUIVALENTS
ANCIENT GERMANIC: Ingo
GERMAN: Ingo
OTHER FORMS
ANCIENT SCANDINAVIAN: Ingi, Ingimárr, Ingólfr
DANISH: Ingolf
GERMANIC MYTHOLOGY: Ing
NORWEGIAN: Inge, Ingolf
SWEDISH: Inge, Ingemar, Ingmar, Ingolf