Sonja Morawetz Sinclair (December 3, 1921 – May 23, 2024) was a Czechoslovak-born Canadian journalist, author, and cryptographer.

In June 2017 she was honoured by the British government for her service as a World War II codebreaker for an Ottawa branch of Bletchley Park signals intelligence between 1943 and 1945.

[4][3] Between 1943 and 1945, Morawetz Sinclair worked as a World War II codebreaker for an Ottawa extension of Bletchley Park signals intelligence.

Baryshnikov sprinted away after a performance in downtown Toronto to a waiting getaway car that took him to a farm near Markham, Ontario.

He stayed there for a couple of days until journalists caught up to him, at which point he moved to a cottage on Lake Muskoka owned by Morawetz Sinclair's family.