Had a good look at Find My Past passenger records from 1890/1960
This could be them but not sure.
SAMUEL PEARSON age 24 Insurance
BETSEY PEARSON age 25 Housewife
Sailed from Liverpool 24 May 1929 to Montreal on the Duchess of Atholl.
England last permanent residence.
Address given, 56 Vicars Hall Lane, Boorthstown, M/C where ever that is.
also below,
MRS E.M.PEARSON age 45 Brit Passengers Cabin Class.
Miss E PEARSON age 14,
Master A PEARSON age 8 address for these 3 is,,,,,,, 36 KERSIE rd THROSK STIRLING.
MRS M B PEARSON age 23
Master age one. Address 22 Kersie Rd Stirling.
They all sailed to Capetown Port Natal,from Southampton on 11Dec 1947 on Capetown Castle;travelling together.
Perhaps Samuel did not survive ww2.
Hope this helps,
Brionne.