French pionnier

← French pion (mention)

← Old French peonier (derived)

← Old French peon (mention)

← Latin pedo (derived)

→ Spanish pionero (borrowed)

→ French pion (link)

→ Hungarian pionír (mention)

→ Norwegian Bokmål pioner (derived)

→ Norwegian Nynorsk pioner (derived)

→ Polish pionier (derived)

→ Romanian pionier (mention)