We have some mini onioins growing in our side yard, how are they still living ?

Question

well see wayyyyyyyyy before our city was built, it used to be a farm, adn obviously they had planted onions and left them there...

well our side yard has some growing and they are the really stout kind of onions and they are really small...are they really onions or what are they?

Answer 1

They're not onions. It's nut sedge, a very pervasive weed.  DON'T pull them out.  You'll spread them.  They are very hard to get rid of.  Check your local garden center or greenhouse for the remedy.  NOT HOME DEPOT OR LOWE'S

Answer 2

It is a wild form of onions.  There is also wild garlic.  They are considered weeds and are best gotten rid of by pulling they up roots and all.  If allowed to go to seed your whole yard will end of covered in them.