In Jainism, this question is mainly about custom (maryādā) and health/law, not about a direct scriptural rule.

1. Jain āgamas do not list “2nd cousin” etc.

Our scriptures focus on principles (ahimsā, aparigraha, brahmacharya, etc.), not on modern legal terms like “2nd cousin marriage.” So there is no direct Jain śāstra line saying “you may / may not marry your 2nd cousin.”

1. Traditional Jain practice (both Śvetāmbara & Digambara)

- Jains generally avoid marriage in close blood relations. - Many communities keep a rule like: - Don’t marry within the same gotra / close lineage. - Avoid relations that are considered too near by local custom and law (like first cousins, uncle–niece etc.). - How “near” is defined (up to which generation/cousin level) varies by community, region and even family.

1. Health and legal aspect (very important)

- Modern medical science warns about higher genetic risk in children if parents are closely related. - Also, many countries/states have legal restrictions on marriage between certain blood relatives. - Jain dharma teaches ahimsā and responsibility toward future children. So knowingly taking a high medical or legal risk would go against the spirit of Jain ethics, even if some custom permits it.

1. What is usually advised in Jain families

- Follow local law strictly. - Follow your community’s maryādā (what your Jain samaj / guru / elders accept) about allowed relations. - Prefer a match without close blood relation, because it is: - safer for future children (less risk of harm → aligns with ahimsā), - socially easier and cleaner in most Jain communities.

1. Summary in simple words

- Jain scriptures don’t explicitly say “you can/can’t marry your 2nd cousin.” - But Jain values + health + law + community custom usually guide you to avoid close-blood marriages. - Best is to: - check legal rules where you live, - talk to your parents/elders and a respected Jain guru / scholar of your own sect and community, - and prefer a marriage that is clearly free from close blood relation and fully in line with ahimsā and maryādā.

If you tell a little about which Jain community (e.g. Oswal, Porwal, Sthanakvasi, Digambar etc.) and which country/state you are in, your local Jain elders can give a very precise community answer based on that.