The family tree that shows him as Harry Robert Hussey is the one I started, the middle name is incorrect. For some reason I thought my mom told me his middle name was Robert but she did not.
I have to correct that.
The boarder in the 1921 census is 21 at the time and Harold is 3, so the ages are right for it to be his mother but Lillian’s last name says brown.
Here’s all the info of the 1921 census
Harold M Robinson 30
Thomas Brown 25
Elizabeth Robinson 25
Lillian Brown 21
Harold Robinson 3
Lillian Robinson 1
Thomas Brown 1/12
Name Harold Robinson
Gender Male
Racial or Tribal Origin English
Nationality Canada
Marital Status Single
Age 3
Birth Year abt 1918
Birth Place Ontario
Residence Date 1 Jun 1921
House Number 135
Residence Street or Township 167 Soranren Ave
Residence City, Town or Village Parkdale Toronto
Residence District Parkdale
Residence Province or Territory Ontario
Residence Country Canada
Relation to Head of House Son
Father's Name Harold M Robinson
Father Birth Place England
Mother's Name Elizabeth Robinson
Mother Birth Place Ontario
Can Speak English? Yes
Can Speak French? No
Other Language none
Religion Church Of England
Can Read? No
Can Write? No
Municipality Toronto
Enumeration District 113
Sub-District Toronto (City)
Sub-District Number 12
Enumerator Chester E Shirlock
District Description Polling Subdivision no. 31 - Comprising Macdonell Avenue, west side, from Garden to Fern Avenue, Sorauren Avenue, east side, from Garden to Fern Avenue, Garden Avenue, both sides, from Macdonell to Sorauren Avenue, Fern Avenue, both sides, from Macdonell to Sorauren Avenue
The census from 1911 you found is not the same person I think.
The marriage certificate does not have a last name for his parents
Thanks guys!