[Leica] Where do elmar, summ etc come from

[Javier Perez <japho@cunyvm.cuny.edu>]

I was wunderin
How did Leitz come up with names for lenses originally.
It's clear enough that the name is almost always indicative of the
lens's max aperture but going beyond that. where does the summ and the
elma come from. Did leitz have a daughter named Elma? I can understand
Hektor but not much else. Who's Thambar, Thumper's little brother?
Any ideas?
See Ya
Javier