پای فارسی (پادَ پهلوی و سنسکریت، پاذَ اوستایی) با foot در زبانهای ژرمن همریشه است:

पाद m. pAda foot

foot (n.)

"terminal part of the leg of a vertebrate animal," Old English fot "foot," from Proto-Germanic *fōts (source also of Old Frisian fot, Old Saxon fot, Old Norse fotr, Danish fod, Swedish fot, Dutch voet, Old High German fuoz, German Fuß, Gothic fotus "foot"), from PIE root *ped- "foot." Plural form feet is an instance of i-mutation.