the Law tells me i am only allowed to give that Name to a Child if i find a Country or Region somewhere in the World whereas that Name is used for a Male person.
If that's the case all you have to do is look at Spanish speaking countries and Portugal where this name is more popular than in Poland. It's a symbolic name of Christ, in Poland you will find two versions of this name for the males Manuel and Emanuel and for females Manuela and Emanuela although they are rare.
Famous people with this name are:
Manuel I Komnen, Emperor of Byzantium. (28 XI 1118–24 IX 1180)
Manuel II Paleolog, Emperor of Byzantium. (27 VII 1350–21 VII 1425)
Manuel I the Great, king of Portugal (31 V 1469– XII 1521)
Manuel Maria Barnosa du Bocage, Portuguese poet (17 IX 1765–21 XII 1805)
Manuel Jose Quintana, Spanish poet (11 IV 1772–11 III 1857)
Manuel Jose d’Arriaga, first president of Portugal (8 VII 1839–5 III 1917)
Manuel González Prada, Peruvian poet (6 I 1848–22 VII 1918)
Manuel de Falla, or Manuel Maria de Falla y Matheu, Spanish composer (23 XI 1876–14 XI 1946)
Manuel Gálvez, Argentinian author (18 VII 1882–14 XI 1962)
Manuel II, Last king of Portugal (15 XI 1889–2 VII 1932)
Manuel Roxas, first president of the independent Republic of the Philippines (1 I 1892–15 IV 1948).