Erwin König and Heinz Thorvald are names of an apocryphal Wehrmacht sniper allegedly killed by the Soviet sniper Vasily Zaytsev during the Battle of Stalingrad.
Fedir Trofymovych Dyachenko (; (June 16, 1917 - August 8, 1995), was a Ukrainian Soviet sniper during World War II, credited with as many as 423 (425) kills.
 He was born in the village of Velyki Krynky, now part of Hlobyne Raion of Poltava Oblast.
Liudmyla Mykhailovna Pavlychenko (Ukrainian: Людмила Михайлівна Павличенко , Russian: Людмила Михайловна Павличенко ; July 12, 1916October 10, 1974) was a Ukrainian Red Army Soviet sniper during World War II.
 Credited with 309 kills, she is regarded as one of the top military snipers of all time and the most successful female sniper in history.
Noah Petrovich Adamiya (Georgian: ნოე ადამია , Noe Adamia; Russian: Ной Петрович Адамия ) (December 21, 1917 – July 3, 1942) was a Soviet sniper of the Soviet Maritime Forces and Hero of the Soviet Union during World War II.
 He participated in the Sevastopol sniper movement and personally trained about 80 snipers.
 Adamiya is credited with killing around 300 German soldiers during the Battle of Sevastopol.
Nil Fyodorovich Filatov (Russian: Нил Фёдорович Филатов , 2 June [O.S. 21 May] 1847 , or 16 April [O.S. 4 April] 1847 , – 8 February [O.S. 26 January] 1902 ) was a physician who is considered the founder of Russian paediatrics.
 His nephew Vladimir Filatov was a prominent ophthalmologist.
Vladimir Petrovich Filatov (Russian: Владимир Филaтoв , 15 [O.S. 27] February 1875, Mikhaylovka, Penza Governorate, Russian Empire - 30 October 1956, Odessa, Ukrainian SSR) was a Russian and Ukrainian ophthalmologist and surgeon best known for his development of tissue therapy.
 He introduced the tube flap grafting method, corneal transplantation and preservation of grafts from cadaver eyes.
 He founded the Institute of Eye Diseases & Tissue Therapy in Odessa, Soviet Union (today Ukraine).
 Filatov is also credited for restoring Vasily Zaytsev's sight when he suffered an injury to his eyes from a mortar attack during Battle of Stalingrad.
Semyon Danilovich Nomokonov (12 August 1900 – 12 June or 15 July 1973) was a Soviet sniper during World War II, credited with 367 kills, recorded in his sniper log.
 An ethnic Buryat-Mongolian Hamnigan Evenk, Nomokonov was among the indigenous peoples of Russia who fought in the war.
 He received the nickname Taiga Shaman from the enemies.
Klavdiya Kalugina (born 1926) was a Soviet sniper in the Second World War.
 She joined the Communist Youth league Komsomol in 1943 where she qualified as a sniper.
 She entered active service at age 17 in March 1944, fighting on the 3rd Belorussian Front as one of the youngest women snipers.
 She has 257 confirmed kills.
MS-74 (№74 Factory's Modernised" Sniper rifle ") was a limited edition Soviet sniper rifle, made by Yevgeny Dragunov in 1949 at Izhevsk Machinebuilding Plant.
 The weapon was based on Mosin's rifle with 7.62×54mmR cartridge.
 The main aim was to increase accuracy and improve the comfort.
 It was tested and recommended for use.
Vasily Grigoryevich Zaytsev; 23 March 1915 – 15 December 1991) was a Soviet sniper and a Hero of the Soviet Union during World War II.
 Prior to 10 November, he killed 32 Axis soldiers with a standard-issue rifle.
 Between 10 November 1942 and 17 December 1942, during the Battle of Stalingrad, he killed 225 enemy soldiers, including 11 snipers.

Question: Vladimir Filatov is credited with restoring the sight of which Soviet sniper?
Answer: Vasily Grigoryevich Zaytsev