Used to on small personal grows, but the larger grows can get....confusing. I do however ALWAYS name my mother plants, and this time around I also named my strain I created a few years back as well, it's name is MP...for "more please", cause all my friends want it, it's so good.
usually ill just call them jane but every great once in a while if i find one fem that i really love ill give her a special name regarding a certain quality about her. peace.
I give seeds a name (just to know the basic genetics). After that clones just get a 1, 2, 3 of the 'parent' name ( for clone of clone of clone aka: Cass:1, Pat:3)