Callsign Obi facts

While investigating facts about Callsign Obi, I found out little known, but curios details like:

Ewan McGregor's brother is a pilot in the RAF, and his callsign is "Obi-Two"

Ewan McGregor's brother Colin is a RAF Tornado pilot, his callsign is Obi Two.

In my opinion, it is useful to put together a list of the most interesting details from trusted sources that I've come across. Here are 2 of the best facts about Callsign Obi I managed to collect.