Hyacinthoides. This type is often called H. hispanica but actually many of them are H. x massartiana.

The native ground cover is Hydrophyllum.

Google gives it a pretty nasty reputation. Looks like something I should dig up before it goes to seed.

Dig it out, now, before it goes to seed. Trust me. Pretty but very hard to control. The leaves grow up and out after flowering and smother more desirable plants. I've been trying to get rid of it for over twenty years.

A thug for sure...