Great to hear from you. We are cousins. How come you live in Ireland? I live in Australia. I was in touch with your father Peter's mother a few years back. But she did not know much. I have been researching our family lines for about 10 years now. I am in touch with nearly all our cousins and I keep them posted on any updates. There is no meaning for the name Martiensen. We are ore of German/Swedish descendant and foll the name changing pattern. To much to say all at once.