Perhaps a native orchid?

Where do you live?

It's a beautiful Erythronium aka trout Lily. Gorgeous native. I can't tell you the species as I don't know them well. But if you ask on Name That Plant someone will be able to tell you. Name That Plant

Looks as if you have a lot there judging by the leaves. Maybe stop mowing there until they finish blooming and let them die down naturally.

I would dig them out (at the right time) and transplant them somewhere with the same growing conditions. I wish I had your problem!

"I would dig them out (at the right time)"
Good luck. It's considered a terribly hard plant to move.
Indeed, the original poster should feel very, very lucky to have this "problem." Some people will say anything unwanted in a lawn is a weed...this is about as non-weedy a weed as you can get! If I had them in my lawn, I would certainly leave them alone.