† ˈattinencyObs. [f. L. attinēnt-em belonging to, pr.pple. of attinēre to hold on to, belong to, relate to: see -ency.] The quality of belonging to; relationship. 1610J. Guillim Heraldry ii. v. (1660) 64 In Attinency we be distinguished in Consanguinity and Affinity.