Q.We’ve Got A Patch In Our Lawn That Looks Like It Could Be An Onion Type Of Plant
The patch is mostly under a tree. Any ideas?

Certified GKH Gardening Expert
Have you dug any up to see if they have a bulb? If it has a bulb it could be the dreaded wild onion. If it is, get rid of it quick. But you would smell the onion if that is what it is.
Does it bloom? Wild onion has a cluster of white flowers.
https://www.gardeningknowhow.com/plant-problems/weeds/killing-wild-onions.htm
https://www.gardeningknowhow.com/plant-problems/weeds/wild-garlic-control.htm
https://www.gardeningknowhow.com/ornamental/flowers/death-camas/death-camas-plant-info.htm