The name Pepin is a boy's name of German origin meaning "awe-inspiring". Pepin and discussed in our forums with posts like "Picky Parents - Sibsets Version".
From the experts:
Most famous as the name of King Pepin the Short, this choice might feel somewhat belittling. The even-shorter form is Pippin, a name adopted for musical theater, and the Dutch form Pepijn is in that country's Top 100.