go by the name (of)
To use the specific name (that is then stated). My daughter Margaret has now decided that she goes by the name Calliope. I'm looking for a man who goes by the name of Whitaker. Do you know him?
go by the name of something
to be known by a specific name. She goes by the name of Gladys George. I used to go by the name of George.
go by the name of...
use a name that may not be your real one: Although she was born Mary Jones, she now goes by the name of Natasha, which she feels is more appropriate to her glamorous image.