Initials OJ - Thoughts?

36 weeks with baby girl #2, and we're struggling with names. Our first daughter's middle name is after my aunt who passed away, and we want our second daughter's middle name to have some significance as well. My grandma's name was Joan, and I'd like to do some variation of that. Only issue is we picked Opal as her first name, meaning she'd have the initials OJ. I can just see some jackass cousin calling her OJ as a joke and then it sticks. What do you think? Come up with a different middle name or am I overthinking it?