Etymology
wolf (n.)

Old English wulf "wolf, wolfish person, devil," from Proto-Germanic *wulfaz (source also of Old Saxon wulf, Old Norse ulfr, Old Frisian, Dutch, Old High German, German wolf, Gothic wulfs), from PIE root *wlkwo- "wolf" (source also of Sanskrit vrkas, Avestan vehrka-; Albanian ul'k; Old Church Slavonic vluku; Russian volcica; Lithuanian vilkas "wolf;" Old Persian Varkana- "Hyrcania," district southeast of the Caspian Sea, literally "wolf-land;" probably also Greek lykos, Latin lupus).

This manne can litle skyl ... to saue himself harmlesse from the perilous accidentes of this world, keping ye wulf from the doore (as they cal it). ["The Institution of a Gentleman," 1555]

Probably extinct in England from the end of the 15th century; in Scotland from the early 18th. Wolves as a symbol of lust are ancient, such as Roman slang lupa "whore," literally "she-wolf" (preserved in Spanish loba, Italian lupa, French louve). The equation of "wolf" and "prostitute, sexually voracious female" persisted into 12c., but by Elizabethan times wolves had become primarily symbolic of male lust. The specific use of wolf for "sexually aggressive male" first recorded 1847; wolf-whistle attested by 1945, American English, at first associated with sailors. The image of a wolf in sheep's skin is attested from c. 1400. See here for a discussion of "wolf" in Indo-European history. The wolf-spider so called for prowling and leaping on its prey rather than waiting in a web.

Related entries & more 
wolf (v.)

"eat like a wolf," 1862, from wolf (n.). Related: Wolfed; wolfing.

Related entries & more 
wolfhound (n.)

also wolf-hound, 1799, from wolf (n.) + hound (n.).

Related entries & more 
lobo (n.)

large gray wolf of the U.S. southwest, 1859, from Spanish lobo "a wolf," from Latin lupus (see wolf (n.)).

Related entries & more 
Beowulf 

Old English beo wulf, literally "bee-wolf," "a wolf to bees;" a kenning for "bear." See bee (n.) + wolf (n.).

Related entries & more 
wolfish (adj.)

1560s, from wolf (n.) + -ish. Earlier form was wolvish (early 15c.). Related: Wolfishly; wolfishness.

Related entries & more 
wolverine (n.)

carnivorous mammal, 1610s, alteration of wolvering (1570s), of uncertain origin, possibly from wolv-, inflectional stem of wolf (n.); or perhaps from wolver "one who behaves like a wolf" (1590s).

Related entries & more 
Rudolph 

masc. proper name, from German Rudolf, from Old High German Hrodulf, literally "fame-wolf," from hruod- "fame, glory" (from Proto-Germanic *hrothi-) + wolf (see wolf (n.)).

Related entries & more 
Randal 

masc. proper name, also Randall, shortened from Old English Randwulf, from rand "shield" (see rand) + wulf "wolf" (see wolf (n.)). Compare Randolph.

Related entries & more 
lupine (adj.)

"wolf-like," 1650s, from French lupin "wolf-like; vicious, ferocious," from Latin lupinus "of the wolf" (source also of Spanish and Italian lupino), from lupus "wolf" (see wolf (n.)).

Related entries & more