Flemish diminutive of Sebastian, Latin
"person from Sebastia"

Seppe Origin and Meaning

The name Seppe is a boy's name meaning "person from Sebastia".
Americans are familiar with Seb as a nickname for Sebastian, but Seppe is an international update. This Flemish nickname name has found popularity in its own right in Belgium and the Netherlands.

Seppe could also be used as nickname for the Italian Giuseppe.