User blog comment:IvyBushe/Muggle-born parents and their children./@comment-14.139.157.211-20130424090028

Yes, it would still be a muggle-born. We call a wizard/witch pure-blood if and only if his/her parents are pure blood. So we take the following as a rule:

Pure-blood + Pure-blood = Pure-blood

Pure-blood + Muggle-born = half-blood

Muggle-born + Muggle-born = Muggle-born