Daniel “Danny” Castilyn, 75, of Butler passed away on Sunday, August 18, 2024. He was born in Butler on July 6, 1949, to the late Frank and Aida (McClelland) Castilyn. Danny graduated from Butler High School; and honorably served in the U.S. Army. He was employed at Pullman Standard, Trinity Industries and the Butler School District. Danny enjoyed watching westerns and gameshows. He enjoyed Pittsburgh sports teams, especially the Steelers and Penguins. Listening to Pink Floyd, loved strawberry treats and was a professional beer drinker. Father of Jason (Melissa) and Justin Castilyn; grandfather of Matthew. Danny is forever loved by Diane Jackson. Along with his parents, Danny was preceded in death by his ex-wife Paula Ann (Malvarose) Okorn. Family and friends will be received on Friday, August 23, 2024, from 5-7 PM at the SPENCER D. GEIBEL FUNERAL HOME & CREMATION SERVICES, 140 NEW CASTLE RD. BUTLER, PA 16001. WWW.SPENCERDGEIBEL.COM. A prayer service will immediately follow in the funeral home.