Right-- it can be from peanut, but it's often NOT from peanut, and in any case, it's really, really, REALLY highly processed and several steps away even from peanut oil (which, recall.... "should" be safe since it contains such low levels of protein).
Personally, we DO NOT avoid either arachidyl or arachidonic/arachidic ingredients per se-- only products which seem to be problematic for DD personally.