Noun
Boii pl (plural only)
(historical) A Gallic tribe of the later Iron Age.
After the loss of their capital, according to Strabo, a large portion of the Boii left Italy. Source: Internet
Invading the Po Valley with a large army, they drove out the Etruscans and resettled it, the Boii taking the right bank in the center of the valley. Source: Internet
Later on, they attacked the city of Noreia (in modern Austria) shortly before a group of Boii (32,000 according to Julius Caesar - the number is probably an exaggeration) joined the Helvetii in their attempt to settle in western Gaul. Source: Internet
Such a connection is possible if the original form of Boii belonged to a tribe of Proto-Indo-European speakers long before the time of the historic Boii. Source: Internet
This is the only "written source" provided by the Boii themselves. Source: Internet
This makes it much more likely that the Cisalpine Boii had actually originated from Bohemia rather than the other way round. Source: Internet