had never scanned the efforts to use (Jeez, wayback in '70s) such as ter, in search of that elusive mellifluous-replacement for these gender-specifics.
(What we get, for Engrish's descent from Latin, now Español's -a and -o suffixes.)

Problem with ter seems to have been that it favours "her", and trying tim is bad for any Tim around.
Well, Ms. worked well enough to replace Mrs., yet still we flounder, fully flummoxed.
I gots no grammatically-compliant balm either (nor does their satisfy when used for any bloody-singular. Duh.)