Though I cannot provide any good information on your genealogy, I can share with you my excitement in finding another Erin Garrow in the world.
My Garrow clan hails from Wisconsin in the United States and are the ultimate descendants of Irish immigrants. As you and I are namesakes of one another, I wanted to establish contact.
My parents got a little carried away with our Irish heritage in naming me, as I'm not female, as I'd expect that you are, but male. (Sorry to disappoint, if you were looking for a twin out there somewhere.)
Though I've no idea where this correspondence may lead, I'd love to hear from you; it could be that we both learn a little more about the Garrow clan.