| Themistocles Leftheris | |
|---|---|
 Nam and Leftheris in 2006. | |
| Full name | Themistocles Nicholas Leftheris |
| Other names | Themi Leftheris |
| Born | December 20, 1982 Tarpon Springs, Florida |
| Height | 1.83 m (6 ft 0 in) |
| Figure skating career | |
| Country |  South Korea |
| Partner | Ji Min-ji |
| Coach | Peter Oppegard Karen Kwan-Oppegard |
| Skating club | Los Angeles FSC |
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Themistocles Nicholas "Themi" Leftheris (born December 20, 1982) is an American-South Korean pair skater. With partner Naomi Nari Nam, he is the 2006 Skate America bronze medalist and 2007 U.S. national bronze medalist. With partner Ji Min-ji, he is a two-time (2016, 2017) South Korean national champion.