The new Zygote Numbering System (ZNS17)

My kids (actually ours, credit where due) are pretty inspiring.I may be giving them shout-outs from time to time in this blog and they may prefer a bit of anonymity and privacy, (Well, I know you don't Z2, but some the other Zygotes might.) And I've never documented the Zygote Numbering System (TM), so here's my chance.I created the ZNS years ago for amusement (mine) and annoyance (the Zygotes) but I think they've decided to be at least a little amused. Or decided to pretend to. Or not. Anyway, I'm still amused.The ZNS began as a wsimple enumeration: Zygote 1 (Z1) is our eldest daughter. Z2 the middle. Z3 is our youngest.Then Z2 had a kid, and I revised the ZNS to account for that. Z2 (with her husband's help) had Z2.1, Z2,2 and Z2,3; then Z3 (with help) produced Z3.1 and Z3,2; and most recently Z1 (with help) produced the lovely Z1.1.But what about those helpers? They were once Zygotes, and are now are my sons-by-marriage. Writing this post brought me to realize that the ZNS needed further extension.I hereby welcome Zbm1, Zbm2, Zbm3 to the Extended ZNS (2017), aka ZNS17. For reference: ZBM is pronounced Zih buhm (accent on the second syllable) by the cool kids. That being me.For referential completeness, I've assigned myself the Zygote root symbol: Z. Bobbi is Z'. (Z prime).Approved 1/8/2017 by the ZNS Engineering Task Force (ZETF).