It's time to play Guess The Human!
Here's a list of characters mentioned in The Uplift War
Athaclena, Ma'chutallil, Mathicluanna, Oshoyoythuna, Oth'thushutn, Prathachulthorn, Thlufallthreela, Uthacalthing
Seven are Tymbrimi and one is human. I doubt you can tell which is the human unless you have read the book. (Pick one before spoiling yourself.)
Answer: It's Prathachulthorn
All the names are four or five syllables and all contain the sound th.
Furthermore, the character in question's name is not typically
as described (although I guess the first syllable or two are not terribly unusual for that culture).
Is there an explanation for this choice of name in- or out-of-universe?