posługiwać się pseudonimem

The woman, using an alias, delivered a girl and a boy about 20 minutes apart early Monday at the hospital.

He also changes his first name when using an alias, whereas most people change their last names.

The peculiar thing is that he didn't use an alias.

If you're going to use an alias like Smith, you'd better have an original story behind it.

The guy used an alias, so he's probably married, and she may or may not be.

Two or three times, and he was always using an alias.

During the 1960s, Belli could write and speak without having to use an alias.

He also used a second alias on the record simply called "Tomme".

He said, "You have any idea if he's using an alias?"

"And found enough so that you have to use an alias?"