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Sasha from WikiPedia:

Sasha is a male and female given name. It originated in Russia and other countries of Eastern and Central Europe as a diminutive version of the names Alexander and Alexandra. It is also found as a surname, although this is very rare. Alternative spellings include: Saša (Slovenian, Serbian, Croatian, Czech, Slovak, Lithuanian), Sasza (Polish), Sascha (German), Sasja (Dutch), and Sacha (French).

This name is especially common in Eastern Europe where it is used primarily by males, although females may also use it as a diminutive of Alexandra. Despite its popularity in informal usage, the name is rarely recorded on birth certificates in countries such as Russia, the Czech Republic, Poland, and Slovakia, as it is considered a diminutive and not a formal name. Exceptions are Serbia and Croatia.

In Germany, the civil registry offices allow the inscription of Sascha in birth certificates as a formal name but only for boys.

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