Loganair came out of the corporate flight department of Logan Construction, started by father Duncan Logan pre-WW2, and really built up by son Willie Logan. They did construction projects all over Scotland from an Inverness base, including both the motorway through Glasgow and the Tay Road Bridge, and found an aircraft valuable for visiting the widely dispersed locations. Willie bought a Piper Aztec for this. Not required all the time, it started being hired out, and this was the beginning of Loganair.
In 1966 Willie requested a flight from Glasgow to Inverness, but the Aztec had already been chartered out, so they hired one in for him from Strathallan Air Services, an air taxi operator. This crashed on approach to Inverness, killing Willie but the pilot walked away. Loganair carried on and ended up, with different owners, with the current operation, and still the same name, universally recognised in Scotland.