A memorial service for Alvin and Kathy Liknes will be held on Sept. 27 at the First Alliance Church in southeast Calgary.
The announcement was posted on the website of a Calgary funeral home.
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The couple, along with their five-year-old grandson Nathan O'Brien, have been missing from their home since June and are presumed dead.
Although the bodies have not been found, police say there is sufficient evidence and have charged 54-year-old Douglas Garland with two counts of first-degree murder and one count of second-degree murder .
A private memorial service for O'Brien was held on Sept. 4.
According to the obituary posted by Eden Brook Funeral Home, Alvin Liknes was born in Coronation, Alta.
"He was an original thinker who listened with interest and attention to whomever was speaking," read his obituary. "Intelligent and sensitive: Alvin believed in human rights. He believed in efficiency and thinking things through."
An avid skier, Alvin Liknes was also taking lessons on how to fly a plane and skydive.
"When he hugged his children they could feel his love and pride for them radiating like the sun," said the obituary. "He commented with wonder on his wife’s beauty (both inside and out) and he loved to walk with her."
Kathy Liknes was born in Calgary. She earned certificates in web design, graphic design and online publishing and also had a licence to sell real estate.
"A fierce and watchful mother, Kathy’s children (and her grandchildren) knew how much she loved them," read her obituary. "She loved to dance, but most of all she loved to dance with her husband Alvin."
Garland court appearance
Garland made an appearance in court in Calgary earlier this week.
Defence lawyer Kim Ross says his team is still waiting for a substantial amount of evidence to be disclosed by the Crown.
The Crown expects to have all the case files ready by the end of the year, and should have all lab results from evidence collected by police at that point.
CBC News earlier learned there were soured business dealings between Garland and Alvin Liknes, including a patent dispute.
Garland, whose sister is in a common-law relationship with Alvin Liknes’s son, was arrested on July 14 following an extensive search of a property north of Calgary that is owned by Garland's parents.