Rosemary Blaire Leith, Lady Berners-Lee (born September 1961),[2] is a Canadian-born British director of both for-profit and non-profit organizations.

Leith was born in September 1961,[2] in Toronto, Canada,[4] and studied at Queen's University at Kingston.

[4] During the dot-com bubble at the end of the twentieth century, Leith co-founded the webzine Flametree with Jayne Buxton, an acquaintance from Queen's University who also lived in West London.

[5] Leith was appointed, along with Katrin Henkel, as a trustee of the National Gallery in London for a four-year term from March 2016.

[6] In June 2021, Sir Tim Berners-Lee auctioned the source code from the web as a non-fungible token (NFT) at Sotheby's.