köken: Perhaps from Ancient Greek βοτήρ (botḗr, “herdsman”), akin to βόσκω (bóskō, “to graze”). Alternatively from Ancient Greek βούτης (boútēs, “yokel”), from βοῦς (boûs, “cattle”). Caix derives it from Vulgar Latin puttulus, diminutive of puttus, from Latin putus (“boy”), since the meaning is still present dialectally (for the shift of change in suffix compare donnacchera).
köken: Thought to be derived from Sanskrit अर्बुद (arbuda, “sore, tumor”). Supposedly, was first used by Buddhist monks (as 頞部陀(あぶだ) (abuda)) in reference to Arbuda (the Buddhist hell of chilblains).