1930 Kankakee, Kankakee, IL, Kankakee State Hospital
Claude Pelsang, b. Italy, 46
I didn't find him in an 1940 Census.
Frederick Van Beuren Pelsang, b. 1840 New York City & d. 1903 New York City and Willett Yarwood, b. 1852 New York City & d. Hoboken, New Jersey were his parents. Frederick's second wife was Annie Higgins b. 1845 & d. 1876.
Source: Ferraro/Nunke Family Tree
He had many siblings and half-siblings. I'm sure you'll find them in the Census records. Successful Searching!