Bluetooth devices can be renamed by that user, so any type of device could be trying to pair. You can’t tell from the name alone.
Bluetooth pairing requires proximity, so it is something close to you (a neighbor maybe, or a kid on the street, but probably not a few blocks away from you). It can be accidental or opportunistic (but fruitless as it wouldn’t work without your approval). For Bluetooth Class 2 devices (e.g. many wireless headphones and other wearables, also mobile devices) that would often be within 30ft, likely less for interfering obstructions like walls.
When a device is actively trying to pair with your device, then you have the option of ignoring semi-permanently. Then your device will not allow pairing attempts anymore from that other unidentified and unauthorized device.