Table 1.

Information on the 11 ancient individuals investigated in this study, including radiocarbon dates, average read length, average genome coverage, average mtDNA coverage, mtDNA and Y-chromosome haplogroups, biological sex, and contamination estimates based on mtDNA and on the X-chromosome in males.

sample	site/grave	country	context	date cal BCE (95% CI)	Av. RL	nu cov	MT cov	MT hg	Y hg	biol sex	cont est MT (%)	cont est X (%)
ber1	Bergsgraven	Sweden	BAC	2620–2470	84.5	3.24	1344	U4c1a	R1a-Z283	XY	0.19	0.80
ber2	Bergsgraven	Sweden	BAC	2640–2480	74.4	0.48	443	N1a1a1a1	—	XX	0.26	—
oll007	Ölljsö	Sweden	Megalithica	2860–2500	77.4	1.24	86	H1c	—	XX	0.44	—
oll009	Ölljsö	Sweden	Megalithica	1930–1750	99.7	1.01	325	H6a1b3	n.a.	XY	1.97	0.32
oll010	Öllsjö	Sweden	Megalithica	1880–1660	87.7	0.26	96	X2b11	—	XX	1.83	—
kar1	Karlova	Estonia	CWC	2440–2140	61.9	2.35	2481	H1f1a	—	XX	0.79	—
ajv54	Ajvide	Sweden	PWC	2900–2680	89.3	0.91	510	U5b1d2	n.a.	XY	1.24	0.58
ros3	Rössberga	Sweden	FBC	3330–2930	64.1	0.37	30	K1b1a1	—	XX	0.40	—
ros5	Rössberga	Sweden	FBC	3090–2920	97.9	0.85	106	J1c5	IJ-M429*	XY	0.19	0.28
poz44	Obłaczkowo	Poland	CWC	2870–2580	86.6	0.11	253	U3a'c	—	XX	0.29	—
poz81	Obłaczkowo	Poland	CWC	2880–2630	84.4	1.87	172	U4b1b2	R1a-M417	XY	1.32	1.15

^aMegalithic contexts mean that the individuals are from the FBC-associated megalithic tomb, but constitute secondary burials and have radiocarbon dates associated with the BAC time period (oll007) or the Scandinavian Late Neolithic and Bronze Age (oll009 and oll010).