Hank

Henry "Hank" Stone was the biological father of Cyrus, Clara, and Derrick; husband of Glinda; son-in-law of H'x C'stor; and old friend of Acronix and Krux. He was murdered by an old classmate of his back in the mid 1970s.

Trivia

 * He's one of the tallest characters in the series, even taller than Zane.
 * He speaks with an Irish accent, since he was raised by his Irish father.
 * The author describes his voice as "Karlof but Irish"
 * The author describes his personality as that of a hippie. Thing is, he was born in the late 1910s and the whole "hippie movement" didn't start until the 1960s.