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			Here, we present the analysis of Y-chromosome obtained from seventeen, not yet reported, ancient male samples excavated from different burial sites in Poland: Kowalewko (Roman Iron Age), Maslomecz (Roman Iron Age), Legowo (early Middle Ages) and Niemcza (early Middle Ages).
We successfully assigned haplogroups to sixteen individuals. Eight belonged to haplogroup I1 (I-M253). Three of them belonged to the sub-branch I1a3a1a1a (I-L1237) and one to I1a2a (I-Z59). I1 is the most common haplogroup in present day Scandinavia, and it is found in all places invaded by ancient Germanic tribes and Vikings. Four samples belonged to haplogroup G2a (G-P15) which is spread uniformly throughout Europe. Other individuals were assigned to I2a2 (I-M436), R1a (R-M420), R1bl (R-L278), E1b1 (E-P2). The next portion of samples is under investigation. With this study we hope to shed new light into the genetic structure of populations inhabiting lands of contemporary Poland during the Roman Iron Age and the Middle Ages.                           
			
		
	
 So out of 16: