Sisters Child

My oldest sister, now deceased, had a son born sometime in 1951 (same year as me). All I know is that she went (we believe) to New Hampshire.....had to have been around Walpole VT, or Alstead NH area where my aunt lived. I don't know "when" he was born in 1951.....but I'm hoping that maybe he knows my family name "Hanscom". It would be interesting to have a nephew the same age as myself. I wish my sister was alive to give me more information, or to help in the search by providing more information. And my parents are both gone now. I know this is a shot in the dark, but there's nothing to lose for trying. Any help would be appreciated. Thanks.