That's much info to go on when it has no location, but I see a possible family in Bridgeport Boro Ward q, Montgomery, Pennsylvania in 1910.
Charles Allen 35 Clara Allen 36 Eliza A Allen 15 Leonard H Allen 13 Anna M Allen 12 Monroe R Allen 10 Ralph E Allen 8 Margaret F Allen 6 George S Allen 4 Carrie G Allen 2 Jessie A Allen 2 Months
All born in Pennsylvania as were the parents of the parents.Shows married 15 years and occupation says "Operator" in a mill and I can't make out what kind of mill ..aning Mill, I think.
In 1920 Leonard is still in the home.A couple of the older girls are gone and a new child is added, a daughter Ruth K. 6.This time the father is a laborer with a Casket Company and all of the older children are employed.
In 1900 they are in Conshohocken Borough with Charles born Oct 1875, age 24, a carpenter. Clara D born Dec 1874, age 25, married 5 years, 4 births, 4 living children.
Lidie (or Lidia, not sure) Feb 1895, age 5 Leonard H born Oct 1896, age 3 Anna M, born Dec 1898, age 2 Monroe R, born Jan 1900 5 months All birth locations are Pennsylvania