These Jews adopted the name Ashkenaz, and the DNA of Ashkenazic Jews can be traced to “Ancient Ashkenaz” – an intersection of trade routes in eastern Turkey.

Source - The conversation

https://theconversation.com/ashkenazic-jews-mysterious-origins-unravelled-by-scientists-thanks-to-ancient-dna-97962

Archived

https://web.archive.org/web/20180905155241/https://theconversation.com/ashkenazic-jews-mysterious-origins-unravelled-by-scientists-thanks-to-ancient-dna-97962

Note that their primary ancestry is not from ancient Israel