Jainism and Mixed Marriages
Some communities were once almost entirely Jain,
even when they become brahmanical, their
personal values were Jain-like.
Intermarriage was sometimes permitted within a
few nyats (Agrawal, Shrimal etc):
girls got married at a very early age
they absorbed, learned and followed husband's religion
(Ex. Br. Pandita Chandabai of Arrah)
statistically drifted into Brahmanism
There are people with names "Sanghavi",
"Saraogi" even "Jain" who are no longer Jain.