William Mapother

William Mapother is one of those actors who makes you feel genuinely uneasy in the best possible way — the man was born to play characters who are wrong in ways you can't quite put your finger on. His turn as Ethan Rom on Lost is legitimately one of the creepiest recurring performances in prestige TV history; he barely said a word and still managed to make every scene feel like a threat. But he's more than a villain-for-hire: In the Bedroom showed real dramatic depth, and Another Earth leaned into a quieter, more haunted register that he nailed completely. A Notre Dame-educated guy from Louisville who never became a household name despite having genuine chops — I think he's exactly the kind of actor serious film people appreciate far more than casual audiences do, and honestly that feels right for him.

Name (English)

William Mapother

Name (Japanese)

ウィリアム・メイポーザー

Reading

うぃりあむ・めいぽーざー

Born

April 17, 1965 (age 61)

Zodiac / Chinese zodiac

Aries / Snake

Origin

Louisville, Kentucky, United States

Occupation

actor / teacher / film actor / television actor

High school

St. Xavier High School

University

University of Notre Dame

Motto

Private

• Official sitehttps://williammapother.com/
• Wikipedia (Japanese)https://ja.wikipedia.org/wiki/%E3%82%A6%E3%82%A3%E3%83%AA%E3%82%A2%E3%83%A0%E3%83%BB%E3%83%A1%E3%82%A4%E3%83%9D%E3%83%BC%E3%82%B6%E3%83%BC

Tags

• Kentucky
• actor
• teacher
• film actor

Last updated

2026-06-02

Facts are limited to publicly available information up to 2024; non-public or unconfirmed items are omitted. English text is machine-assisted (facts translated by Sonnet, "My Take" written by Opus 4.8). The Japanese page is the source of record.