1550s, "enjoying the company of others," from French sociable (16c.) and directly from Latin sociabilis "close, intimate, easily united," from sociare "to join, unite," from socius "companion, ally," from PIE *sokw-yo-, suffixed form of root *sekw- (1) "to follow."
Others are reading
<a href="https://www.etymonline.com/word/sociability">Etymology of sociability by etymonline</a>
Harper, D. (n.d.). Etymology of sociability. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/sociability