One of the R1b clades look to be under R1b L21>DF13> Z39589>Z251>> FGC13899. Confirms there where Celtic adjacent clades [In Western Jews] even before migration West of Europe. I suspect the incursion is provided via admixture of the Gauls of Turkey AKA Galatians. https://www.yfull.com/tree/R-Y7624/
https://en.m.wikipedia.org/wiki/Galatians_(people)
https://en.m.wikipedia.org/wiki/Galatians_(people)