I think the interesting question (and probably one that won’t be able to be discussed here) was when Jewish Christians stopped getting circumcised. I’m wondering about a son born in the household of a couple of Jewish converts to Xty. Is there any info on this?
I don’t know. Interesting that St. Timothy was circumcised by Apostle Paul just so that he could bring Timothy to the Jewish temple. Timothy’s father was Greek and Timothy was not originally circumcised (Acts 16).