In Klingon, a be' is a female of any age and a loD is a male of any age. To specifically refer to a younger one of these, add -Hom. You probably wouldn't use -Hom for anyone past the Age of Ascension, but whatever other usage patterns there may be are subtle and murky. In general, if you're not talking about children (however defined), stick with be' and loD. (qepHom 2021)