Yvonne de Pfeffel (30 July 1883 – 1958)[2] was a French tennis player in the first decade of the 20th century.

She had an elder sister, Marie Louise Pfeffel von Kriegelstein (1882–1944) who was the great-grandmother of Boris Johnson, a former British Prime Minister.

In 1907 she won the inaugural doubles title at the closed French Championships partnering Adine Masson.

In the French singles championships she was a runner-up in 1905, losing the final in straight sets to Kate Gillou.

[3] In February 1902 the Tennis Club de Paris organized a ping pong tournament which was won by Yvonne who defeated her sister Marie-Louise in the final.