What was the Walkman originally called in the U.S.?

The answer is: The Soundabout. When it was first released in the U.S., Sony used the term “Soundabout” instead of Walkman. In the UK it was known as the Stowaway, and Australia got the Freestyle. Turns out the regional marketing approach was pointless, and Walkman became the global and permanent name not long after.Source