Looks like a minneola tangelo to me, aka Honeybell if you’re in FL.

https://citrusvariety.ucr.edu/citrus/minneola.html

Evan

Because it was sated that the peel was thick, it must be a Sumo. Plus Honeybells are not all that sweet.

Wallstgardener, how long has the tree been in ground and where are you located?

Located in AZ. Tree was long established before I move to this house 3 years ago.

Here’s a picture of the tree from further back (on left)

Were Sumos even available to purchase in Arizona? They haven't been around all that long, and may be difficult to find in Citrus states.

The eating experience is really different between them. Regarding Minneolas, they are very messy (juicy) to eat. Juice all over the place. Juice is on the tart side.

With Sumos, they break apart in dry sections without losing any juice. You don't even get your hands wet. Pulp has lots of vesicles. Sumos are seedless for the most part, although I have found as many as 12 seeds in one once. Nice flavor, mild and sweet.