- finn: (Irish) white, pale, fair (e.g. fair hair); pure, true, blessed → Finnegan = fairheaded
- Finn-: (Germanic root) designates moist-swampy places and rotten smell
- Finne: (German) pimple; blotch
- Tim Finnegan: the Dublin hod-carrier who fell drunk from his ladder and apparently died in the popular Irish-American street ballad from the 1850s Finnegan's Wake. At his wake, a bottle of whiskey broke on his coffin and he "came back to life". Much of the text of the ballad is echoed in the first chapter of FW.
- Fionn mac Cumhail: (earlier Finn or Find mac Cumail or mac Umaill, pronounced roughly "Finn m'Cool") a legendary hunter-warrior of Irish mythology, also known in Scotland and the Isle of Man as Fingal.
- Huckleberry Finn: character who features in several books by Mark Twain; a friend of Tom Sawyer
- fin: (US Slang) a colloquial term for the five-dollar bill bearing a portrait of Abraham Lincoln
- Finn: a giant who, according to folk mythology, built the cathedral in Lund, Sweden → sometimes identified (probably erroneously) with Finn MacCool
- Finn: a Frisian lord who appears in Beowulf and The Fight at Finnsburg
- fin: (French) end → Mister Finnagain!
- Michael Finnegan: (song) eponymous character in the popular song Michael Finnegan → Mister Finnagain!. Each verse of the song ends "Poor old Michael Finnegan/Begin Again," creating a cyclical structure like that of Vico and FW.
- Finn’s Hotel: a hotel in Leinster Street, Dublin, where Nora Barnacle worked when Joyce first met her