words - What to call the 7th Lubavitcher Rebbe

Often times a few different rebbes are mentioned (either previous Chabad rebbes or rebbes of other Chasudusim) in the same talk and then the word "The Rebbe" comes in and it's ambiguous.

I have heard the 7th Rebbe called:

• The current rebbe


• Our rebbe


• most often: The rebbe

I don't really think any of these are adequate.

I've never heard him called:

• The 7th rebbe


• The last rebbe

What's the best way to avoid confusion?