Translation:We admired Kahless's father's sister's husband.
I'm mildly disappointed that it's not written "Kahless' father's...", given our DIvI Hol convention of writing "Jesus' father's..." ;-)
The various respected style guides disagree on how to do possessive in words that end in s. Some say if it ends in s just use '. Some say always use 's. Some say on a singular endings in s, use 's, but on a plural ending in s, just use '. We try to accept all of them and may be inconsistent in which we use for the "best" translation.
Hi! I didn't understand... "tennuS" means "paternal uncle"... why "father's sister"? Thanks for your attention