Phoenician waw — "hook", through Greek digamma.
F
F, U, V, W and Y all descend from one Phoenician letter, waw. Five letters of the English alphabet are the same ancestor, split five ways.
Crawford · Ferguson · Fernandez · Ferrari · Field · Fields · Fischer · Fisher · Fitzgerald · Fletcher · Flores · Flynn · Ford · Foster
In the modern alphabet this letter is number 6 of 26. Before it comes E, after it G. The order itself is inherited: Latin took it from Greek, Greek from Phoenician, and the sequence has survived largely unchanged for about three thousand years. Every rearrangement since has been an insertion, not a reshuffle.
This is a consonant: it sets the hardness of a name and how it meets the next word. In a corpus of 315 surnames this letter opens 19 and closes 1. Among the 96 given names in the base it appears in 2. The surname carrying the most of it is Griffiths, with 2.
Frank · Jennifer
All of them descend from a single Phoenician letter, waw.