Boon
Middle English (originally in the sense ‘request for a favour’): from Old Norse bón .
wiktionary
From Middle English boon(“prayer”), from Old Norse bón(“prayer, petition”), from Proto-Germanic *bōniz(“supplication”), influenced by boon(“good, favorable”, adj). Doublet of ben; see there for more.
From Middle English boon, bone, borrowed from Old Northern French boon, from Old French bon(“good”), from Latin bonus(“good”), from Old Latin duonus, dvenos, from Proto-Indo-European *dū-(“to respect”).
From Middle English bone (North), akin to or alteration of Old English bune(“reed”). [1]
boon (plural boons)
etymonline
boon (n.)
late 12c., bone "a petition, a prayer," from Old Norse bon "a petition, prayer," from Proto-Germanic *boniz (source also of Old English ben "prayer, petition," bannan "to summon;" see ban (v.)). The sense gradually passed from "favor asked" to "thing asked for," to "a good thing received, a benefit enjoyed" (1767).
boon (adj.)
in boon companion "convivial friend, close intimate" (1560s), the only real survival of Middle English boon "good" (early 14c.), from Old French bon (see bon), from Latin bonus "good" (see bonus). Probably influenced by boon (n.).
