What looks like an onion but isn't an onion?

[islerunner]

I've been digging up an old flower bed in my garden and I keep finding small round things that look like silver skin onions. I'm often finding them in clusters and they can vary in size from around the size of a grape to a ping pong ball.

Does anyone have any idea what they could be? (I've googled to no avail)

Bluebells!!
I have found them 'lurking' under 60cm of soil!!! The tiny ones are babies... bulbils...

Probably bulbs.

Maybe bluebells or snowdrops? Can’t exactly remember what the bulbs of each look like but I’ve dug up similar and have both in my garden.

Allium bulbs?

Another vote for flower bulbs.

If they're buried too deep or too overcrowded, they won't blossom.

A Gladioli bulb got me years ago - I actually bit into it thinking it was an onion! (coz I used to eat raw onion as a child - don't judge)

What looks like an onion but isn't an onion?
It could be an allium, which is in the same family as onions. Here's a webpage about alliums which includes a photo of bulbs - do yours look like this?

Bluebells are white, superficially like onions but tend to be elongated - the round stage certainly doesn't last till ping pong ball size. Alliiums are a possibility, also I think grape hyacinths tend to be white, although they'd all be grape sized. Possibly Scilla - there's some species which are large enough to have ping pong ball sized bulbs. I'm going from memory of what I've dug up in my garden.

Crocosmia, crocus both have brown netting/fibrous skins, and daffodils have brown shiny skin (although daffodils have been responsible for poisonings of people who have eaten them thinking they were onions).