苏利文

苏 + 利 + 文 approximates 'Su-li-wen' → Sullivan. The Taiwan rendering 蘇利文 is the same. Note that Pixar's 'Sulley' Sullivan from 《怪兽电力公司》 (Monsters, Inc.) is a common pop-culture anchor for this name in Mandarin subtitles, alongside historical figures like architect Louis Sullivan.

usage

Multiple transliterations exist: 苏利文，苏利万，and 沙利文 (more common in mainland news for political figures, e.g., U.S. National Security Advisor Jake Sullivan). 苏利文 is the form you most often see in subtitles.