“I can tell you pretty much every Iranian in Edmonton knew some of them,” Mr. Akbari said. “So it’s very devastating.”

The crash also took the lives of the wife and daughter of an Iranian author, Hamed Esmaeilion, a dentist celebrated as a leading writer of his generation.

Husband-and-wife engineering professors at the University of Alberta, Mojgan Daneshmand and Pedram Mousavi, and their daughters Daria and Dorina Mousavi, were also killed. The university described Professor Daneshmand as a pioneering researcher in microwave sensors who had been making advances for a variety of products, including wearable health monitors.

In North Vancouver, Arash Azrahimi, owner of Rosewood Photography, said several of the victims had been his customers. Two of them, he said, Mohammadhossein and Zeynab Asadilari, who were in their 20s, were children of a member of the Iranian government and had been living in Vancouver.

Other victims from Vancouver area included a couple — both of them doctors — and the wife and daughter of a bakery owner, he said.

Majid Mahichi, a Vancouver-based television producer of a Persian-language program, knew the doctor couple, Firouzeh Madini and Naser Pourshabanoshibi, for 40 years. He said they had gone to Iran to visit their parents and had one daughter, who did not travel with them.

The pair moved to Canada about five years ago, Mr. Mahichi said. “They were a very happy couple,” he said. “They were so happy to have moved to Canada.”