consanguinity
From Longman Dictionary of Contemporary Englishconsanguinitycon‧san‧guin‧i‧ty /ˌkɒnsæŋˈɡwɪnəti $ ˌkɑːn-/ noun [uncountable] formal FAMILYwhen people are members of the same familyExamples from the Corpusconsanguinity• They, too, have been deaf to the voice of justice and consanguinity.• The belief in, if not the fact of, consanguinity has its uses.• Pentecostalism and jazz are undeniably siblings, with all the consanguinity and rivalry such a blood link always brings with it.Origin consanguinity (1300-1400) Old French consanguinité, from Latin, from com- ( → COM-) + sanguis “blood”