Hi, the California death record for John Kent Huber says his mother's maiden name was Kent. So you are seeking the family of Maria Kent born 1878 in England, you don't know her parents' names and would like to find out and discover their descendants - have I got that right?
In 1920 Maria is here:
1920 Wilkinsburg Ward 3, Allegheny John J Huber 38 Marie Huber 40 John K Huber 14 Charles E Huber 9
In 1910 the Huber family lived in Pittsburgh.
Sounds like you know when Maria married John Jacob Huber? Was that before or after she immigrated?