Русско-англо-русский юридический словарь

Family law (also called matrimonial law) is an area of the law that deals with family matters and domestic relations [...] (Wikipedia)

Matrimonial regimes, or marital property systems, are systems of property ownership between spouses providing for the creation or absence of a marital estate, and if created, what properties are included in that estate, how and by whom it is managed, and how it will be divided and inherited at the end of the marriage. Matrimonial regimes are applied either by operation of law or by way of prenuptial agreement in civil-law countries, and depend on the lex domicilii of the spouses at the time of or immediately following the wedding. (Wikipedia)

Again, you should consult with a lawyer about the pros and cons of having a legal agreement in place before marriage – and once you have a ring on your finger, the matrimonial courts are able to redistribute or transfer assets between spouses in a ‘fair and reasonable’ way. (Property Road)

Marital property, also known as matrimonial assets, is different from non-matrimonial assets. (Corporate Finance Institute)