going by (a name), calling oneself
今はそう名乗ってる
That's what I go by now.
— 続・夕陽のガンマン (1966)
That's what I'm calling myself these days.
なぜ今ビル・カーソンと名乗ってる?
Why are you calling yourself Bill Carson now?
偽ジャクソンは今はビル・カーソンと名乗ってる
Fake Jackson is going by the name Bill Carson now.