Rina, in my experience, what is usually called a "Whale Fin" Sans is often a Sans masoniana. I have one -- and while it does grow an occasional new leaf -- it grows "its own kind." In your case, you seem to have a nice variegated one.

But -- I may be able to shed light on the other orphans that are growing. I occasionally buy from a local grower, and she gets a few plants from another local grower about 50 miles away and he often grows unusual Sans. I recently bought a large Sans, pretty neglected, that had overgrown the pot and put out leaves from the bottom/side drainage holes. I bought the whole thing, cut it up and repotted.....and then set out to find its origin.

Initially, the best I could liken it to was a Sansevieria Kirkii -- maybe a Kirkii pulchra (not Coppertone), maybe a kirkii NOID. Then, in really digging -- on Etsy, on eBay, and on thousands of Sans photos on Flickr, I came across a photo called Sans Macrophylla. That looked A LOT like what I had bought. I had never heard of it -- but it's out there and findable. Here's the good part: If you plug into a search engine "Sansevieria Macrophylla X Masoniana" -- you will get some images that seem (to me anyway) to resemble what you have posted. So -- hybridizing maybe?

There is a monster-size collection on Flickr that seems to include some similar photos about 2 or 3 pages in. Fun to look at when you have time. I hope this helps you. Happy hunting! Please post back and let us know what you have decided as an outcome.

https://www.flickr.com/groups/1379516@N20/pool/page3

Thank you very much...I am going to look and see if/what I find...

It looks like S. masoniana variegated. One variegated leaf that was rooted and it will produce regular S. masoniana plants. First new leaves are junivile and later leaves will be different. Almost never having more than 2 to 3 leaves to a node. They have more going on in the pot than what's showing above. Roots like sweet potatoes. They are known pot breakers.

I have seen some single leaf variegated plants sold on Ebay with people thinking they are getting a S. masoniana variegated but only to end up with all future leaves being regular. You must have a section of variegated rhizome to produce a variegated plant. Variegation varies greatly as plant ages.

Stush

Many Thanks; I was hoping for you to see this post and comment. I checked what Robin recommended too. So IIUC, that leaf was rooted, and most likely didn't have any of the original, variegated rhizome so new growth reverted to "regular" masoniana? I guess it took a while for all that growth (roots on the original leaf and then 2 plants - I got it from a greenhouse, so they would have better growing conditions?) There is a 3rd plant coming up soon I think (see 3rd photo in op).

I have another, just a single leaf (see the group photo). I think they are slow growers?

I noticed that rhizomes are much thicker/robust than other sans...

I'm not a big fan of S. masoniana. I gave mine to my son who then sold them. I do love the one you have in the back in the round pot. It looks like S. aubrytiana (Jaboa) 'Lauren' or S. aubrytiana (Sayuri) 'Yellow Stone'. Both are very hard to tell apart and I have both. Some think they are S. hyacinthoides (former guineensis) variegata but they are completely different. It is a nice grower and fills out well.

That pot I showed above is bent out of shape and trying to explode out. Like I said, more roots then leaves going on with that plant.

Stush, I have one that looks much like yours. it has broken 2 pots already. When I bought it, it was 3 singular-but-growing leaves, kind of sad looking variegated leaves stuffed into a pot that was already cracked. I have repotted it enough to make me tired, but I must admit, it is flourishing so I keep it and treasure it. And hope I don't have to repot it! The older I get, the more partial I am to smaller Sans that I can lift easily and repot easily. If I can get a Sans in a 4 or 5" pot and let it explode into a 6 or 7 inch pot -- I'm happy and satisfied.

In my younger day I was thrilled with massive plants and big explosions. But I have already given away one very large masoniana and two huge trifasciatas that were challenging. The woman I gave them to has a perfect backyard and planted them in the ground. Good for her! I'm more of a small pot person now myself.

The one I'm really watching now is the one I described to Rina at the start. I've seen it called Macrophylla by 2 local growers here in Florida. One buys and propagates from the other. I am NOT a fanatic about proper identifications. I'd rather spend my energy trying to give the plant what it LIKES to grow its best, so....I just call it a Sans Kirkii Maybe Macrophylla!

What I hate most about S. masoniana is that it rarely produces 3 leaves to a node mostly 1 or 2. Then the root rhizome goes off to send up another pup only producing a leaf to two. Large and heavy like you said. I have way too much stock and I'm now at the point that what every I buy, some thing has to go. I have a large Agave collection that many of the plants I have will get 4 feet by 4 feet if kept in small pots. I think I'm crazy. Using a dolly to bring them in and out every year. Wish I lived some where warm where I can plant in the ground.

Oh, you would love where I live. Most of my plants are small-ISH (4" pots up to 10" pots) -- there are about 85 of them now and they are all on rolling carts out on my rear lanai. I can move them out of the sun and back from the screens when it rains....move 85 plants in about 1 minute. But I share your feelings -- if I buy something new, I'm at that point where I need to get rid of one too. Just can't take care of that much anymore. Just gave 9 plants (mostly propagations) to a friend....but it hardly made a dent. Nevertheless.....we DO love our babies, don't we?