Yolande Elsa Maria Beekman (7 January 1911 – 13 September 1944) was a British spy in World War II who served in the Women's Auxiliary Air Force (WAAF) and the Special Operations Executive.

[7] Beekman became an efficient and valued agent who, in addition to her all important radio transmissions to London, took charge of the distribution of materials dropped by Allied planes.

At the beginning of October, she moved to the house of Camille Boury, who worked at the Pharmacie Corteel, and lived on the corner of Rue Baudelaire.

[3] Beekman began quietly visiting Gobeaux's house in Rue de la Fère, letting herself in with her own key during the day, placing her set on a small table and passing the long aerial out through the window above.

Interviewed after the war, Gobeaux remembered Beekman often waiting for the next transmission, lying on a divan with her head in a book, apparently unruffled by the possibility of arrest.

Eugène Cordelette, one of MUSICIAN's lieutenants, later described Bieler and Beekman as being "both of the finest stuff imaginable", but her training should have left her more mindful of security.

Operating from a single static radio post greatly increased the chances of being hunted down by German direction finding (D/F) teams, which were known to prowl the streets of major towns and cities across the country, and it is not clear why Beekman apparently did not use additional hideouts – perhaps it was too difficult to find suitable locations in such a densely populated area, or she might have had technical problems with the wireless sets available.

On Christmas Day she made contact with London as usual, but the following week a direction finding van was seen passing the house, an ominous sign that the net was closing in.

[3] Beekman immediately packed up her set and moved again, this time to the Café Moulin Brulé, a lonely safe house on the north eastern edge of the city, on the northern bank of the canal.

"[9] She was confined there until September 1944, sharing a cell with Elise Johe (a Jehovah's Witness), Annie Hagen (arrested for working as a black marketeer) and Clara Frank (jailed for slaughtering a cow on her family farm without permission).

[10] Beekman was abruptly transferred to Dachau concentration camp with fellow agents Madeleine Damerment, Noor Inayat Khan, and Eliane Plewman.

[13] Ott was stationed at Karlsruhe and volunteered to accompany the four women to Dachau as he wanted to visit his family in Stuttgart on the return journey.