Why do many Christians are general and have Hindu sounding names

I mean - i have noticed that many of the Christians in Kerala , have Hindu sounding names , which is not the case with other denominations or Christians outside Kerala as they have very foreign sounding name like for example Vincent ( i speaking with a context to Tamil Nadu ) .

Also sredichittiondu that orupad rituals are common with hindus like perunnal - for ulsavam , like thallikettu etc.

Also why are many Christians general category, thought that they were minority in India ?

Is there anything related to because they inter marry. ? How do thought that inter faith marriages aren't accepted