Where does “pīpan” come from?

pīpan (Old Saxon) comes from Proto-Germanic *pīpan, from Latin pipo — I pip, peep.

Ancestry of “pīpan”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	*pīpan	—
2	Latin	pipo	I pip, peep

pīpan — Etymology, Origin & Word History | Etymology Explorer