Herbert B. Stevens

I am searching, unsuccessfully so far, for information about Herbert B. Stevens.  I believe he was born in 1920 ot 1921 and was the youngest child of Herbert Llewellyn Stevens and Lenora Frances Dunbar.  I am trying to find out more information about his birth, marriage(s), his children and his date and place of death.  Can anyone please help me solve this puzzle???  I was told that one Herbert's daughters' name was Eileen but no other information on any other children.