1. Is L23 older than L21? I have three very close matching individuals at 67Markers. All three have just recently had Deep Clade Testing done. All three have L23, but only two have L21. Person 1 has L21 & L23 and differs at 464b by 2 Person 2 has L23 only Person 3 has L21 & L23 and differs at CDYa by 1 Y-Search #1 4YH5F #2 K9HKQ #3 ARZ7R 2. Which between #2 and #3, is the closest match to #1? Names don't matter as #1 is an NPE. Hope this isn't too confusing! Karen Y-DNA - R1b1b2a1b5 - L21 mtDNA - H1