consanguinity
noun
con·san·guin·i·ty ˌkän-ˌsan-ˈgwi-nə-tē 
-ˌsaŋ-
plural consanguinities
1
: the quality or state of being consanguineous
persons related by consanguinity
2
: a close relation or connection
the consanguinity of monotheistic religions
Example Sentences
Recent Examples on the Web In April, Drummond, the city’s new police chief, exonerated Claudio, stating consanguinity didn’t apply. 
cleveland, 27 Aug. 2022 Although no one discusses it, consanguinity appears to be a given. Alissa Simon, Variety, 22 Nov. 2021 The risk of unintentional consanguinity—the technical term for relatives hooking up—remains small, but looms large in the minds of those conceived via anonymous sperm donation. Caitlin Harrington, Wired, 30 July 2020
cleveland, 27 Aug. 2022 Although no one discusses it, consanguinity appears to be a given. Alissa Simon, Variety, 22 Nov. 2021 The risk of unintentional consanguinity—the technical term for relatives hooking up—remains small, but looms large in the minds of those conceived via anonymous sperm donation. Caitlin Harrington, Wired, 30 July 2020 Word History
Etymology
see consanguineous
First Known Use
14th century, in the meaning defined at sense 1
Legal Definition
consanguinity
noun
con·san·guin·i·ty ˌkän-ˌsan-ˈgwi-nə-tē, -ˌsaŋ-
: the quality or state of being consanguineous