I didn't find the Boelen family on the 1910 U.S. census. However, on the 1920 U.S. Census of Chandler, Comanche Co., Okla.is the following family: Boelen, Adrienage 43 born Holland Boelen, Cathrine age 45 born Holland Boelen, Dianaage 18 born Holland Boelen, Johanaage 17 born Holland Boelen, Johnage 16 born Holland Boelen, Berthaage 12 born Holland All listed as aliens (Not naturalized) and year of 1mmigration as 1910. Mother tongue listed as Dutch. Adrien Boelen occupation listed as farmer.
On the 1930 U.S. Census of Chandler, Comanche county, Okla.: Boelen, A.age 53 born Holland Boelen, Elizabeth age 39 born Holland (wife) Boelen, Johnage 25 born Holland Boelen, Lawrenceage 5 born Oklahoma Boelen, William J.age 11/12 born Oklahoma. Year of immigration listed for A., and John 1909. Year of Immigration for Elizabeth 1922. So it appears that Adrien married Elizabeth and had Lawrence and William J. All list Dutch as their native tongue. Both list their parents as born in Holland. Adrien listed as farmer in this census. They were renting their farms in both census records. Sally Gill