[Spoilers for the Jurassic Park novel, and JP1-3, JW, and JWFK movies - none for Dominion because I still haven't watched it, and if any of this post contradicts its events, please don't tell me in too much detail]
The last I checked the JP fandom wiki refers to the T. rex family from TLW as "buck" (the adult male), "doe" (the adult female), and "fawn" (the juvenile) on the animals' pages. Things written on fan-maintained wikis aren't automatically canon, of course, and it is also mentioned on the wiki itself that this isn't necessarily official terminology, but I find interesting where this terminology came from, and what the things some of the characters in-universe call the animals says about how they see them.