Locating my Father's relatives

Greetings-
I am searching for my biological father's relatives. His name is Lester Lavell Jenson. His nickname was 'Johnny'.
Birth Date: August 6th, 1935
Birthplace: Utah

Died: October 13th, 1983, Los Angeles, CA

I was told that he had other children born in the late 1950's or even into the early 1960's.

I was born on Sept. 6th, 1962 in Long Beach, CA

You can contact me at mvfamily@cox.net.

Thanks, Wayne