I have a printed copy of a book of research called Dunlevy History dated Dublin 1976 by a Miread Dunlevy, curator at the National Museum in Dublin, Ireland. It traces the name and family back to 350 BC (yes that's right 350 BC).
I would be happy to share the document which I scanned, OCR'd and put in word (.doc) format. If you require it in .pdf, I can convert it to that format also. There will be no charge but I do want your complete name, address, email and phone number. I find this internet method very slow to communicate, so if you have something to say, call me 563.387.3736 in the USA. I go by the name Dave.