Probably a modern English-language coinage with the patterned -shika ending.
Teshika is probably a modern English-language coinage with the patterned -shika ending. Names like this tend to arise from sound preference, regional style, and the creative extension of familiar syllables rather than from one fixed older source. That gives Teshika a contemporary and expressive identity.
The name feels smooth and melodic, with a distinctly modern feminine cadence. It sounds made to be distinctive while remaining easy to say, which is one of the key strengths of patterned modern coinages. Teshika does not need ancient pedigree to function well; its appeal is in its musical structure and personal feel.
It is the sort of name that carries style through rhythm and shape. Teshika sounds lively, polished, and individualized, with a modern quality that makes it feel at home in contemporary naming culture.