The Greek letter K is named Kappa.
It is thought to have been derived from the Phoenician letter Kaph:
The word Kaph "is thought to have been derived from a pictogram of a hand (in both modern Arabic and modern Hebrew, kaph means palm/grip)".
In Dutch, the verb "kappen" means to chop (wood). We used to have lots
of wood, hence "Hol(t)land" (woodland), and very useful for making
Related is the word "inkeping" (notch).
Also related the heraldic term "keper" (chevron).
K looks more like a notch or chevron, than like a hand.
Earlier I have argued that the Greek word Delta (used for their letter
D) can be explained better through Oldfrisian than by the Greek
See D is for del-ta (in Westfriesland a "delte" still means a piece of low lying land (laagte).
Two Greek letters-names that have a more plausible explanation through the Dutch/ Frisian language, than through Greek.
Isn't that interesting?