Ian McKerron Begg was a Scottish architect, known for his work with Scottish castles and their restoration. He attended the Edinburgh College of Art and he served in World War II; he trained with the United States Navy to become a pilot in the Royal Navy's Fleet Air Arm.

Muckrach Castle, also known as Muchrach or Muckerach Castle, is a tower house near the Scottish town of Dulnain Bridge in the Highland council area, which is part of the Cairngorms National Park. It was built in 1598 as the original seat of Grants of Rothiemurchus, with timber used as part of the stone walls. It was unroofed in 1739 and remained ruinous until the 20th century. In 1971 the building was added to the Scottish monument lists in the highest monument category A, before being restored by the architect Ian Begg in 1978–85. It is since used as a holiday apartment.