This was theory i made long ago and i gave up from it after realizing situation better and learning new finds. It was theory based mostly on TMRCA of one subclade (Y22066/Y22059 Balkan cluster). But as it turns out Y22066 has very early separation from its brother clades in Middle East and Mediterranean Europe, up to 5000 years. Therefore it is most likely expansion happened much earlier, perhaps in Bronze Age. It is typical situation for Balkan branches to have similar TMRCA so this is nothing out of ordinary and i made a mistake thinking that TMRCA of particular sublcade tells its arrival time.
There is no proof for any J2-M205 subclade that expanded in Byzantine period. There is South Italy sample which shares TMRCA with Yemen sample in isolated branch 2000 ybp, so perhaps it is Roman time expansion, but other then that most of subclades seem to expand much earlier since we can find J2-M205 along Mediterranean Sea in multiple subclades that separated one from another in timeframe of 5000 - 6000 ybp, so everything looks like Early Bronze Age expansion from direction of Middle East.
No doubt about Phoenicians since Canaanite sample in ancient Sidon 1700 BCE was J2-M205. Also nearby Jordanian mountain sample 2500 - 2000 BCE was J2-M205.
So far i consider it Proto-Semitic with its main expansion in Middle East, TMRCA 5700 ybp.
There is hope for Akkadians and Sumerians, lets see in future : ) But even the ancient Jordanian M205 sample goes strait into early Akkadian period.
It would be helpful if you would do WGS test and upload to Yfull tree. There is at least 4 different M205 branches in Italy. Even my Balkan subclade is identified in parts of Northern Italy. After WGS test we will have better idea about your specific branch, but no matter the subclade there is no doubt that you share same ancestor with all M205 samples in timeframe of 5700 ybp.![]()