Edward Kular's daughter-in-law confirmed Monday the 84-year-old Toronto man and 72-year-old Nina Discombe of Ottawa have died in Mexico.
The couple's names have not been released by police.
Mexican authorities said the couple was found by their gardener in a pool of blood in the living room of the house where they'd lived for at least six months.
Chapala city spokesman Roberto Arroyo said robbery is the main motive behind the Sunday attack on the pair. Some belongings were stolen, including a TV and an SUV.
He said the man was beaten on the head with a small statue and the woman was stabbed in the stomach with a kitchen knife.
"We're all pretty much still in shock, can't believe that it happened. It's like a nightmare, a bad nightmare," said the daughter-in-law, who identified herself only as Christine.
The area is popular among snowbirds and several who knew the couple said they were in shock.
"My friend is dead. She was very respected in the community and was an extraordinary author. She had just bought a house here to live in full-time," said Barbara Wills.
The local Canadian club said the couple would often join in on organized activities.
-With files from The Associated Press