A conlang where which pronoun to use is determine not only by gender but by the first letter of someone’s name.
Actually this is a great idea minus the gender. Gendered pronouns are problematic but useful for disambiguation: compare
“Did you hear Elizabeth and Dan are dating? He said he’d had a crush on her for a long time” to
“Did you hear Elizabeth and Dan are dating? They said they’d had a crush on them for a long time” which is really ambiguous to the point where you just can’t use any pronouns and end up with
“Did you hear Elizabeth and Dan are dating? Dan said Dan had had a crush on Elizabeth for a long time” which is unwieldy.
But with this system you can say stuff like
“Did you hear Elizabeth and Dan are dating? D said D’d had a crush on E for a long time” which is concise, clear, and politics-free!