W6ESB 1930 Los Angeles, California

Could W6ESB be Don Wallace W6AM's father who was also William Haveland Wallace born 1870 in Canada, living in Los Angeles in 1930?
Both Williams used the name Bill and this W6ESB 1930 card was signed Bill.
W6ESB lived another 5 years before his death in 1935.
Is it possible that Don, W6AM was influenced by his father for his interests in Ham Radio?

W8JYZ Collection