Is there a way I can create something that's similar to a hypothetical FindFirstDescendant? I know such a thing doesn't exist, but I have multiple models where, in order to use FindFirstChild, I would have to dig through the many models INSIDE the models, and give each one a unique name. Is there a way I can avoid doing that, and simply say, within a script, to find a brick by a certain name, that's a descendant somewhere in Workspace?
Right now, here's the relevant script...it's a LocalScript, if that makes a difference:
local plr = game.Players.LocalPlayer
local dour = workspace:FindFirstChild("TTDoor1") --Not actually a child; it's a descendant somewhere
print(dour.Name)

5 comments
^ Do you think a break could work also, to prevent it going higher and looking for more?
No, you don't need to add break, return and debounce to stop the loop unless if you have more objects that are same names. For examble you have 4 TTDoor1 object the output will be TTDoor1 (4).
So to use it as a variable to later use in an if statement, would I just say "local dour = v" inside that v.Name=TTDoor statement?
You don't need to add variable. You can replace the "v" into "dour".
But if you want to make a variable of your door you need to make a table and decode it into an object. If you have so many "door" and you just put a normal variable, only just one can be handled.