For Uda Nagu there are 2 on Yasni with different names.
Among the most common last names on Yasni Uda Nagu is on position 4525.
could come from Buda Logudorese indicating the cattail, marsh plant. Or from Yehouda, ie Judah, since around 40 AD an army of Roman soldiers of the Jewish race was sent to Sardinia to fight nuragic (see the book "Sardinian surnames of Jewish origin" of Zadar). Also in Sanskrit means light, eg Udaipur means "City of Light" and Buddha means enlightened. It 'a very common name in Central Asia especially in the area around Lake Baikal.
There is no meaning available yet for "Nagu".
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