I have added the 6th-century samples from Collegno, Piedmont from the Lombard study.
Using all samples (Italians, Lombards and mixed), the closest modern populations are Friuli (6.3), Trentino (7.2) and Aosta Valley (7.9).
Taking into account only samples that seemed to be Italian with no Germanic ancestry, the closest populations are Abruzzo (4.0), Marche (5.8), Lazio, Campania and Sicily (all three around 6.0).
This sample is also extremely close to Imperial-Age_Marche_(n=2).
As well as pretty close to the Iron Age R437:
[TABLE="class: distances"]
[TR]
[TH="align: right"]Distance to:[/TH]
[TH="align: left"]C6_Iron_Age_Mediterranean:R437_(Latin_Prenestini_Tribe_o)_Palestrina_Selicata[/TH]
[/TR]
[TR]
[TD="bgcolor: #B5FF00, align: right"]5.31416974[/TD]
[TD]Imperial-age_Marche_(n=2)[/TD]
[/TR]
[TR]
[TD="bgcolor: #E5FF00, align: right"]6.72588284[/TD]
[TD]EMBA_Greece_(n=6)[/TD]
[/TR]
[TR]
[TD="bgcolor: #EBFF00, align: right"]6.90958754[/TD]
[TD]6th-century_Piedmont_(Italians_only)_(n=7)[/TD]
[/TR]
[TR]
[TD="bgcolor: #F0FF00, align: right"]7.04519695[/TD]
[TD]Italian_Greeks_(n=2)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FFE500, align: right"]8.27300429[/TD]
[TD]Late_Antiquity_Latium_(n=24)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FFD200, align: right"]8.83409871[/TD]
[TD]Mycenaean_Greece_(n=4)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF9D00, align: right"]10.38617832[/TD]
[TD]Early_Medieval_Latium_(n=5)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF9C00, align: right"]10.40333120[/TD]
[TD]Medieval_Foggia_Apulia_(n=5)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF8B00, align: right"]10.92016026[/TD]
[TD]Imperial-age_Latium_(East_Med_immigrants)_(n=46)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF0012, align: right"]15.54221992[/TD]
[TD]Late_Medieval_Latium_(n=16)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF002E, align: right"]16.33827714[/TD]
[TD]Early_Neolithic_Anatolia_(n=7)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF003C, align: right"]16.75771763[/TD]
[TD]Minoan_Greece_(n=10)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF0056, align: right"]17.52457132[/TD]
[TD]Bronze_Age_Sicily_(n=15)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF0058, align: right"]17.57787530[/TD]
[TD]Early_Neolithic_Greece_(n=3)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF006C, align: right"]18.16961750[/TD]
[TD]Chalcolithic_Bulgaria_(n=9)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF006D, align: right"]18.19599956[/TD]
[TD]Middle_Bronze_Age_Anatolia_(n=2)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF0070, align: right"]18.28769805[/TD]
[TD]Bronze_Age_Illyrians[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF0077, align: right"]18.51004592[/TD]
[TD]Etruscans_(n=3)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF0081, align: right"]18.79689868[/TD]
[TD]Early_Neolithic_Starcevo_culture_(n=8)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF009B, align: right"]19.54934782[/TD]
[TD]Villanovans_(n=2)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF00B2, align: right"]20.24499444[/TD]
[TD]Pre-Pottery_Neolithic_Anatolia_(n=8)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF00C6, align: right"]20.83053768[/TD]
[TD]Medieval_Andalusia_(n=14)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF00CE, align: right"]21.05738825[/TD]
[TD]Middle-Late_Bronze_Age_Hittites_(n=2)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FF00E5, align: right"]21.74766884[/TD]
[TD]LN_Lengyel_culture_(n=8)[/TD]
[/TR]
[TR]
[TD="bgcolor: #FC00FF, align: right"]22.59695776[/TD]
[TD]Chalcolithic_North_Levant_(n=6)
[/TD]
[/TR]
[/TABLE]
These samples exist within the light-blue cohort labeled C6.
Rather than attributing it totally to Greeks, could it be possible that this is indicative of a native pre-Italic ancestry?