N.H. Code Admin. R. Jus 419.01
For purposes of RSA 292:6-a, the following terms shall have the following meanings:
i. An uncle, aunt, nephew, niece, or first cousin;
ii. A step uncle, step aunt, step nephew, step niece, or first step cousin; and
iii. A parent-in-law, child-in-law, sibling-in-law, half-sibling-in-law, grandparent-in-law, grandchild-in-law, uncle-in-law, aunt-in-law, nephew-in-law, niece-in-law, or first cousin-in-law.
Source. #14162, eff 12-27-24