What is the name of Obi-Wan’s desert alias?

The story behind the answer

While hiding on Tatooine, he adopts the low-profile first name “Ben” while keeping his own surname. “Old Ben” is a casual nickname locals use, not his chosen identity. “Obi-Wan Kenobi” is his true Jedi name that would endanger him, and “Ben Lars” would wrongly link him to Owen and Beru Lars, with whom he has no family relation.

He takes this alias after Order 66 and Anakin’s fall, living in exile to quietly watch over Luke Skywalker. The understated name reflects his attempt to disappear in plain sight, a thread picked up in A New Hope (where Luke knows of “Old Ben”) and explored further in later canon, underscoring Star Wars’ recurring theme of hidden identities and second chances.