O.E. Belzebub, Philistine god worshipped at Ekron (2 Kings i.2), from L., used in Vulgate for N.T. Gk. beelzeboub, from Heb. ba'al-z'bub "lord of the flies," from ba'al "lord" + z'bhubh "fly." By later Christian writers often taken as another name for "Satan," though Milton made him one of the fallen angels.
"The name of many deities of the Semitic peoples" [Klein], late 14c., Biblical use is from Heb. Ba'al, lit. "owner, master, lord," from ba'al "he took possession of," also "he married;" related to Akkad. Belu (source of Heb. Bel), name of Marduk. Also related to the first element in Beelzebub. Used figuratively for any "false god."
M.E. laverd, loverd (13c.), from O.E. hlaford "master of a household, ruler, superior," also "God" (translating L. Dominus, though O.E. drihten was used more often), earlier hlafweard, lit. "one who guards the loaves," from hlaf "bread, loaf" + weard "keeper, guardian, ward." Cf. lady, and O.E. hlafæta "household servant," lit. "loaf-eater." Modern monosyllabic form emerged 14c. The verb meaning "to play the lord, domineer" is from late 14c.; to lord it is from 1570s. Interjection Lordy first attested 1853, Amer.Eng. Lord of the Flies translates Beelzebub (q.v.) and was name of 1954 book by William Golding.