In Jainism, this question is handled more by family/custom and health science than by direct Jain scripture.

You wrote: “Is paternal 2nd cousin too close for marriage? If I'm his maternal …” I’ll assume you mean:

• He is your paternal 2nd cousin (your father and his father are 1st cousins), and
• You are his maternal 2nd cousin (your mother and his mother are 1st cousins).

So you are related to each other from both sides of the family.

From a Jain-dharma perspective:

1. Scripture (shastra) side

- Jain Agams/Granths mainly stress: - choosing a spouse of good character, health, and virtues - avoiding harm (ahimsa), including possible harm to future children. - They do not give a modern medical list like “don’t marry 2nd cousin, do marry 3rd cousin,” etc. - Traditional Jain society avoids: - Same gotra / very close blood relations. - Marriages considered “too near” by local custom.

1. Practical / health + social angle

- When the relationship is close on both paternal and maternal side, biologically it becomes much closer than a simple 2nd-cousin match. - Many Jain families would treat this as too close and avoid such a marriage, out of: - concern for genetic risks to children, and - respect for long-standing maryada (social boundaries).

1. Digambar / Shwetambar view

- Both traditions: - Don’t have a specific “2nd cousin rule” in core doctrine. - Encourage following healthy, sensible marriage customs that avoid very close blood relations. - Exact limits (which relation allowed or not) are set by local samaj / community, not by Tattvartha Sutra or Agams directly.

1. What is generally wise here?

- From a Jain dharmic and practical view, a partner who is: - Less closely related by blood - With good health and good Jain values is safer and more in line with ahimsa (not risking suffering for future children). - So in your specific case (related from both sides), it is usually considered too close and better to avoid this match.

1. What you should do now

- Speak honestly with: - Parents/elders (who know your family tree in detail), - If needed, a doctor/genetic counselor for health risk clarity, - And a trusted Jain guru or scholar for spiritual/moral guidance. - Ask your own community’s maryada: many Jain samajs have clear internal rules on which relations are not allowed for marriage.

Summary: Pure Jain shastra doesn’t list “2nd cousin forbidden,” but in your specific situation (paternal + maternal 2nd cousin), it is very close blood, and from both Jain ethical thinking (ahimsa, avoiding harm) and traditional Jain social practice, it is better not to marry.