Kostyantyn
Kostyantyn or Kostiantyn is a given name. Notable people with the name include:
- Kostyantyn Balabanov, Ukrainian football player
- Kostyantyn Bocharov, Ukrainian singer and songwriter
- Kostyantyn Dankevych, Ukrainian composer and musical teacher
- Kostyantyn Doroshenko, Ukraine Art critic, contemporary art curator, media manager, radio host of talk radio station Radio Vesti
- Kostyantyn Dudchenko, Ukrainian professional football player
- Kostyantyn Dymarchuk, former Ukrainian football player
- Kostyantyn Gryshchenko, Ukrainian diplomat and politician
- Kostyantyn Kravchenko, Ukrainian footballer
- Kostyantyn Makhnovskyi, Ukrainian professional football goalkeeper
- Kostyantyn Milyayev, Ukrainian platform diver
- Kostyantyn Morozov, Minister of Defense of Ukraine, Extraordinary and Plenipotentiary Ambassador of Ukraine
- Kostyantyn Odolskyi, professional Ukrainian football goalkeeper
- Kostyantyn Ostrozkyi, magnate of the Grand Duchy of Lithuania and later a Grand Hetman of Lithuania
- Kostyantyn Panin, Ukrainian midfielder who has recently played for FC Zhetysu in Kazakhstan
- Kostyantyn Parkhomenko, Ukrainian football player who last played for FC Sakhalin Yuzhno-Sakhalinsk
- Kostyantyn Pavliuchenko, retired Kazakhstani professional footballer who also holds Ukrainian citizenship
- Kostyantyn Piliyev, Ukrainian weightlifter
- Kostyantyn Rurak, retired sprinter from Ukraine, who twice competed at the Summer Olympics: 1996 and 2000
- Kostyantyn Shchehodskyi, Soviet-Ukrainian football player and coach from Moscow
- Kostyantyn Simchuk, former Ukrainian professional ice hockey goaltender
- Kostyantyn Symashko, Ukrainian Paralympic footballer who won a gold medal at the 2008 Summer Paralympics in China
- Kostyantyn Vasyukov, retired Ukrainian athlete specialising in the sprinting events
- Kostyantyn Vizyonok, former Ukrainian football player
- Kostyantyn Yaroshenko, professional Ukrainian football defender for FC Ural Sverdlovsk Oblast in the Russian Premier
- Kostyantyn Zaytsev, Ukrainian Olympic rower
- Kostyantyn Zhevago, Ukrainian entrepreneur, the youngest self-made billionaire in Europe