Hi,

1930 in Hudson County NJ, town of Jersey City

Martin,William-Head age 23 age at first marriage-16 Born Va parents born VA
Martin,Fannie-Wife age 22 age at first marriage-15 Born Va parents born VA
Martin,WILLIAM-Son age 7 born Va parents born Va
Martin,WYZITE-Dau age 5 born NJ parents born Va
Martin,Robert-Son age 3 born NJ parents born Va
Martin,Russel-SOn age 2 born NJ parents born Va

I believe that this is your William because of the Wyzete being in the household. it appears that William's father was named William as well and born in Va. In order to find William Sr. in Va in 1920, you would need to know his parents name or siblings name. William Sr. appears to be born 1907.
________________________________________________________