Me too. My father grew up in a professional family, grandfather was a pharmacist. Private school, then university was his future. So why did he leave the family home, and get a job to support his mother, and why did she leave his father? She was the daughter of an Irish doctor, she and her sister ended up in Scotland, but there is little trace of the family in Dublin. I met my grandfather once when I was very small, then he died. I've never met a another relative of my father's. My dad also served throughout WWII, I found some details of his service in France, but he never spoke of it. He died when I was a teenager.
I'll never know. 😢