The Name is an Anagram: Evelyn Mulwray
Value Men Wryly
Men Value Wryly
The only thing necessary for the triumph of evil is for good (wo)men to do nothing.E. Burke
To me, this makes more sense than your others.
I look for such things, too. Mostly though, 2nd meanings for names or biblical or other references.
So yeah, "Noah" and the water theme, but "Cross" as in "double-cross."
"Jake" as in he wants everything to be just "Jake" or OK in 30s-speak. Maybe "Gittes" hints at a hidden Jewish background? That would explain Cross taunting him with "Gits." Check the British meaning for a "git:" Useless or a fool.
"Mulwray" is just reminiscent of "Mulholland." I'm sure Towne didn't want to talk to that family's lawyers.
"Loach" of course rhymes with "Roach," and implies "lurch" as in "left him in the..."
Ida Sessions, well, she charges for a session, right?