Silendi (Old Frisian) comes from Proto-West Germanic saiwi, from Proto-Germanic saiwiz, from Proto-Germanic sīhwaną, from Proto-Indo-European seykʷ-, from Proto-Indo-European sey- — to be wet; dribble; run; to stretch one's arm;...
Ancestry of “Silendi”, step by step
Silendi traces back through two separate lines of ancestry.