Rosemarie Baio Yaros (died 31 August 2012) was the former actress from Gary, Indianapolis, who portrayed the widow in the Star Trek: The Next Generation second season episode "Elementary, Dear Data" in 1988.

Also known as Rosemarie Yaros she worked as teacher in the performing arts department at the Damien High School in La Verne, California.

She lost her battle with ovarian cancer on Friday, 31 August 2012 at the age of 75. [1]