birth record -
name: Royden Edward Kostka
birth date: 23 Dec 1901
birthplace: Plainfield, Waushara, Wisconsin
father's name: Edward Kostka
father's birthplace: Kewannee, Wis.
mother's name: Josephine Neven
mother's birthplace: Menominee, Mich.
Border Crossings: From Canada to U.S., 1895-1954
Name: Royden Kostka
Arrival Date: 28 Sep 1933
Port of Arrival: Porthill, Idaho, United States
Accompanied by: No one
Departure Contact: Glo, Smiterson
Birth Date: abt 1902
Birth Place: field, Wisc
I would speculate the Royden and his family returned to Canada where he grew up.