köken: Inherited from Latin bubulcus (“herdsman”). For the /-f-/, compare gufo < būbō (“owl”), bufalo < būbalus (“buffalo”), and also tartufo < terrae tūber. Osco-Umbrian origin has been proposed, which might also explain the /-i-/: compare Volscian bim (“ox”).
köken: From older tylp, tylpel, from archaic German Tülpel (equivalent to present-day German Tölpel), from Middle Low German dorper. Doublet of torpare. Regarding the shift in sense from "villager" to "oaf", compare with the origin of the otherwise unrelated French vilain.
köken: A form of the name Johannes, attested as a first name in 14th century. The same etymology applies to surnames Juntti, Junttinen, Junttila, Juntunen, Erkinjuntti etc.
köken: From Proto-Italic *gʷordos (“stubborn, heavy”), possibly from Proto-Indo-European *gʷr̥dos, variant of *gʷrd-u- (“slow, heavy, tired”), though De Vaan acknowledges that the cognates point to a u-stem instead of an o-stem as in Latin. The PIE root is also uncertain. Quintilian called it a "Spanish" (possibly Iberian) word. Compare Lithuanian gurdùs, Latvian gur̃ds (“tired”), Proto-Slavic *gъ̑rdъ…
aile: gurdōnicus
Item in Cacomnemone: Hic est (inquit) ille gurdus, quem ego me abhinc menses duos ex Africa venientem excepisse tibi narravi.
Et gurdos, quos pro stolidis accipit vulgus, ex Hispania duxisse originem audivi.