Mine don't know their names... Since they're almost inseparable and they don't react to treats there never was any chance to get them to know which name belongs to which.. Not that any of us cares...
I'd say it's not too hard to tell whether you're bonded with your bengal, although I wouldn't be able to spell it. My two guys love each other and spend the best part of the day on their own so it's easy for them to bond with each other but they like to be around me and follow me wherever I go, they're happy to come asking for pats, which they'wouldn't do when they were younger. They still hate to be picked up unless it serves their (short-term) interest, like if they're interested in what's happening on the other side of the window which they can't get to on their own. They also quite happy to chat with me about current events happening in the world, even if we don't share the same opinion. In short, I know they love me