My guess is pregnant onion, an ornithigalum (check the spelling on that) like those called star of bethlehem. My spelling is pretty poor and I'm operating on my first cup of coffee for the day! But if you just search for pregnant onion you should find it. It'll produce flowers when healthy, and little bulblets on the body of the main bulb. It' can get pretty big too. I keep mine evergreen and but a bit dry over the winter season.
chaz

Yeah, this had bulblets at one point in time. It was doing pretty well for awhile but I put it outside for like, ten or twenty minutes one day and it managed to wilt horribly in that period of time and never really recovered right so I just sort of forgot about it. Reading some of the comments on PlantFiles, though, this isn't necessarily a bad thing as they can go dormant?

Looking at pictures, though, almost positive it's a pregnant onion. Knowing that, I'll start taking proper care of it. Let's see how this goes!

Anyway, any advice on potting it? It's in a pretty large pot right now, for it's size, and it looks like they like smaller pots judging from pics I've seen. And is it actually succulent? Some stuff I'm reading makes me think it is.

Amccour, Pregnant Onions are succulent. Over time, little bulbs grow alongside mom..Hundreds of little bulbs..LOL..so if by chance mom passes, you'll have spares..Just set bulb in soil and they root..My PO flowers once a year. A long spike bearing little flowers. Because the flower spikes grows tall, 2-4', they need a stake if you want it to stand erect.
I've been looking for another type of onion, the one w/ferny growth that grows from a round bulb. Darn, can't think of its botanical name. In winter this onion goes dormant, loses foliage, whereas Ornithogalum (the bulb you have) is everygreen.
Yep, PT bulbs have papery peels, just like a true onion. Toni

amccour,
I keep mine very tight in the pot, the bulb almost touches the sides, I will have to move it up a size this year though. It's in a 3 inch pot for 2 years now. I've seen them up to 8 inches in diameter at the New England flower show with a flower spike over 5 feet tall! I keep mine on the dry side in the winter, water it maybe once a month if the plant room is cold. During the spring and summer I water it so the bulb always stays firm. It'll get a little spongy when it needs water. I wouldn't say it's a succulent so to speak but the bulb does store water and nutrients for it's growth. I think they do better with regular watering. As far as soil, I use a pre-mix cacti and succulent mix with a little extra perlite. I don't like the soil to stay wet around the bulb for fear of rotting it if it gets too cold over the winter.