I just found Thomas Isbister age 55 (born NJ) and his wife Catherine age 50 (born NY) living on Madison Ave. in Jersey City, NJ on the 1930 Fed. Census.It says both of his parents were born in Scotland and both of her parents born in Ire. Freestate.
There are two boarders living with them:
Philip Tambling age 24 George Pfromm age 25
I think I have more on their son Thomas who married Helen Rooney, but I have to do some digging.