Baby name

Heidy

So me and my husband have come decided on a name for our baby boy. The issue is that when we told some family members what we chose they were mad because we chose a name that is from the Bible (even though that is not why we chose it) and my husband wanted it to be spelled different. I was told that it is wrong to take a biblecal name and change the spelling. Are we wrong for wanting it to be different.

So we picked Isaac but want to spell it Izik