Where does “McFuck” come from?

McFuck (English) comes from English fuck, from Middle English fukken, from Old Norse fukka, from Proto-Germanic fukkōną, from Proto-Indo-European pewǵ- — to punch, fist-fight; to prick, poke, stab.

Ancestry of “McFuck”, step by step

McFuck traces back through two separate lines of ancestry.

via English fuck

StepLanguageWordMeaning
1EnglishfuckTo have sexual intercourse, to copulate; To have...
2Middle Englishfukkento fuck; to beat, strike
3Old Norsefukka
4Proto-Germanicfukkōnąto blow, gust; to strike, assail; to copulate
5Proto-Indo-Europeanpewǵ-to punch, fist-fight; to prick, poke, stab

via English MC

StepLanguageWordMeaning
1EnglishMCInitialism of master of ceremonies; A rapper;...
Every word from Proto-Indo-European pewǵ-Every word from Proto-Germanic fukkōnąEvery word from Old Norse fukka