Dagna was born on June 24, 1935. She graduated from Eastern High School in Washington DC.
Dagna had a career in the telecommunications industry, working for local telephone utilities in Virginia.
She was married to Louis Conrad Gilroy on October 15, 1954, at Waugh Methodist Church in Washington DC. She married Lou at the age of 19, and they were married for 64 years.
Dagna was a member of The Lions Club and had a passion for serving others.
She is survived by her son Leonard, her daughter-in-law Arnynn, her six grandchildren, and her godson, John Bennett.
A visitation will be held at Green Acres Mortuary & Cemetery, 401 North Hayden Road, Scottsdale, Arizona, 85257, on February 6, 2026, at 10:00 am.
A memorial service will follow at the same location at 11:00 am, with a graveside service at 12:00 pm.