Refers specifically to relatives by birth rather than through marriage. After the reunion, I realized he was a distant kinsman related through my great-grandfather.
Pro Tip 2/3
Male Specific
The term 'kinsman' usually signifies a male family member. For females, 'kinswoman' is used. My grandfather's brother is my closest living kinsman.
Pro Tip 3/3
Formal Context
'Kinsman' can sound formal or archaic; 'relative' is more common in everyday language. At the will reading, each kinsman awaited news of their inheritance.