family law
marriage law
http://id.loc.gov/authorities/subjects/sh85081508
https://en.wikipedia.org/wiki/Category:Marriage_law
https://en.wikipedia.org/wiki/Marriage_law
https://homosaurus.org/terms/marriageLaw
https://www.wikidata.org/wiki/Q17542970
Laws related to the legal requirements that determine the validity of a marriage, and which vary considerably among countries.
marital law
marriage laws
matrimonial law
law