Who counts as a sapinda?
The Hindu Marriage Act 1955 defines it in Section 3(f). Count upward from yourself, with you as generation one:
- Through your father: five generations (you, your father, grandfather, great-grandfather, great-great-grandfather).
- Through your mother: three generations (you, your mother, her parents).
Two people are sapindas if one is a direct ancestor of the other within those limits, or if they share an ancestor who falls within the limits for both of them. In practice: anyone who shares a grandparent with you through your mother, or a great-great-grandparent with you through your father, is likely your sapinda.
The degrees of prohibited relationship
Separately, Section 3(g) lists specific relationships that can't marry, including:
- direct ancestors and descendants, and their spouses;
- brother and sister, uncle and niece, aunt and nephew;
- the children of a brother and sister, of two brothers or of two sisters, meaning all first cousins, on either side.
That last line covers both "parallel" cousins (your father's brother's or mother's sister's children) and "cross" cousins (your mama's or bua's children).
What Section 5 says
Section 5 lists the conditions for a valid Hindu marriage. Two of them are about relatives:
- 5(iv): the two must not be within the degrees of prohibited relationship, unless a custom or usage governing each of them permits it.
- 5(v): the two must not be sapindas of each other, unless a custom or usage governing each of them permits it.
A marriage that breaks either rule is void under Section 11, as if it never happened. Section 18 also makes it punishable with simple imprisonment of up to one month, a fine of up to one thousand rupees, or both.
The custom exception
The Act recognises that some communities have married cousins for generations. Cross-cousin marriage, such as marrying your mother's brother's daughter, is a long-standing custom in parts of South India and among some other communities. Where such a custom governs both families, the marriage is valid.
The custom has to be real: the Act defines it as a rule observed continuously and uniformly for a long time, certain, reasonable and not against public policy. Courts ask for proof. In January 2024 the Delhi High Court upheld the sapinda prohibition and said a custom claimed to get around it must be strictly proven.
Is same-gotra marriage legal?
Yes. Gotra isn't mentioned anywhere in the Act. Two people of the same gotra can legally marry as long as they aren't sapindas or within the prohibited degrees. Families may still avoid it by custom, and that's a personal choice. See the gotra list.
Other laws in India
- Muslim personal law permits marriage between first cousins, and it is common in many Muslim communities in India and Pakistan.
- The Special Marriage Act 1954, used for civil and inter-faith marriages, has its own list of prohibited relationships that includes first cousins on both sides. It allows an exception only where a custom governing at least one partner permits the marriage, and that custom must be recognised by a state government notification.
- Christian and Parsi marriages follow their own laws, each with its own list of close relatives who can't marry.
Legal is one question. Genetics is another.
Whatever the law allows, related couples have a higher chance of both carrying the same hidden recessive condition, like thalassemia. Children of first cousins face roughly 5 to 6% risk of a serious birth defect, compared with about 3% for unrelated parents. What the science says about cousin marriage, and how a carrier check answers the question for your couple.
This is general information, not legal advice. For your situation, talk to a family lawyer.
Sources
- Hindu Marriage Act, 1955 (India Code)
- Delhi High Court upholds sapinda marriage prohibition (LiveLaw, January 2024)
- Special Marriage Act, 1954 (India Code)
- Rajya Sabha debate on the Hindu Marriage Bill, 13 December 1954
- Bittles AH, Black ML. Consanguinity, human evolution, and complex diseases. PNAS (2010)