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Maciej
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<p>Maciej is a <a href="/facts/Polish_language/lzpvYDvV">Polish</a> given name, the etymological equivalent of <a href="/facts/Matthias/XAnJktwF">Matthias</a>. Its <a href="/facts/Diminutive/29BW2gfw">diminutive</a> forms are Maciek, Maciuś. </p><p>Namedays according to Polish calendar: 30 January, 24 February, 14 May </p><p>Maciej may refer to: </p>