Hello thomas1 and thank you for your question.
The name Jacobite has nothing to do with the biblical Jacob, but comes
from the latin name for James which is Jacobus.
"BURKE'S PEERAGE & GENTRY'S A TO Z GUIDE"
The name Jacobite comes from the Latin for James, Jacobus. It was
given to a group supporting James VII of Scotland and II of England in
the 17th and 18th Centuries."
"The word Jacobite derives from ?Jacobus?, Latin for James, and
designated supporters of the claim of King James II (and his son,
James Francis Edward Stuart, the ?Old Pretender?, and grandson,
Charles Edward Stuart, ?The Young Pretender? or ?Bonnie Prince
Charlie?) to the throne of England following his removal in the
Glorious Revolution of 1688."
Thank you for your question, and if you need any clarification of my
answer, do not hesitate to ask prior to rating my answer.
Very best regards
Search strategy included:
Jacobite jacobus latin