|Full name||Yakov Yan Toumarkin|
|Born||15 February 1992|
In August 2010, representing Israel at the 2010 Summer Youth Olympics, he won the silver medal in the Boys' 100-meter backstroke, finishing a tenth of a second behind the gold medalist at 55.28 seconds. Toumarkin also won a silver medal in the Boys' 200 meter backstroke, at 1:59.39. It was the third-best-time ever for an Israeli, after times of Guy Barnea and Yoav Gat, and an Israeli youth record.
In July 2011, at the 2011 World Aquatics Championships in the 200-meter backstroke in Shanghai, China, he set a new Israeli long course (50 m) swimming record (1:58.21 minutes). Toumarkin said: "I managed to put all of the pressure out of my mind, and just pretended I was competing in a club competition in Israel."
In August 2015, he set the Israeli national record in the 200m backstroke with a time 1:55.96 minutes while winning the gold medal, and won a gold medal in the 100m backstroke with a time of 53.96 seconds. At the 2015 European Short Course Swimming Championships, he set the 100 IM Israeli national record with a time of 52.75.
- Olympic Results, Gold Medalists and Official Records
- Talshir, Uri (February 15, 2011). "Swimming / World Championships / Toumarkin joins London-bound Israelis". Haaretz. Retrieved November 17, 2011.
- Talshir, Uri (February 15, 2011). "Swimming / World Championships / The magnificent seven". Haaretz. Retrieved November 17, 2011.
- "YOG Singapore wins its first YOG medal". Channel NewsAsia. August 16, 2010. Retrieved November 17, 2011.
- "Sport Israël – Taekwondo : Avec Sa Medaille D'Or, Gili Haimovitz Devient Une Star Aux Jeux Olympiques De La Jeunesse A Singapour – Son Adversaire Iranien A Déclaré Forfait". IsraelValley. Retrieved November 17, 2011.
- "YOG China's Tang-Yi, France's Anna Santamans share gold in 50m freestyle". Channel NewsAsia. August 20, 2010. Retrieved November 17, 2011.
- "Tok bronse i ungdoms-OL – Sport – NRK". Nrk.no. August 16, 2010. Retrieved November 17, 2011.
- Hipsh, Rami (February 15, 2011). "Athletics / Kroyter leaps to Israel's third gold". Haaretz. Retrieved November 17, 2011.
- "Results" (PDF). omegatiming.com. Retrieved November 17, 2011.[permanent dead link]
- "Results Summary" (PDF). omegatiming.com. Retrieved November 17, 2011.[permanent dead link]
- Swimming - Yakov-Yvan Toumarkin (Israel)
- Swimming: Toumarkin finishes nationals in style with another gold medal - Israel News - Jerusalem Post
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