What is Izzie Stevens's full first name?

Izzie Stevens’s full first name is Isobel.

The character is formally named Isobel Katherine Stevens, while “Izzie” is the nickname used throughout Grey’s Anatomy. She is introduced in the 2005 series premiere as one of the five surgical interns at Seattle Grace Hospital, alongside Meredith Grey, Cristina Yang, Alex Karev, and George O’Malley. Katherine Heigl portrayed Izzie during the show’s original central ensemble period.

Izzie’s background distinguishes her from many of her colleagues. She grows up with her single mother, Robbie, in a trailer park and later becomes a medical student and surgical intern. Her storylines include her relationship with Denny Duquette, her battle with metastatic melanoma, and her marriage to Alex Karev. She later becomes an attending surgical oncologist.

The name is sometimes mistaken for Isabella, but the character’s canonical full name is Isobel Katherine Stevens. “Izzie” is a familiar nickname for Isobel, not a shortened form of one of the answer choices.