Frisii
The Frisii (Old Frisian and Old English: "Frīs") were an ancient Germanic tribe living in the low-lying region between the Rhine–Meuse–Scheldt delta and the River Ems, and the presumed or possible ancestors of the modern-day ethnic Frisians.

The Frisii lived in the coastal area stretching roughly from present-day Bremen to Bruges, including many of the smaller offshore islands. In the 1st century BC, Romans took control of the Rhine delta but Frisii to the north of the river managed to maintain some level of independence. Some or all of the Frisii may have joined into the Frankish and Saxon peoples in late Roman times, but they would retain a separate identity in Roman eyes until at least 296, when they were forcibly resettled as "laeti"  (i.e., Roman-era serfs) and thereafter disappear from recorded history. Their tentative existence in the 4th century is confirmed by archaeological discovery of a type of earthenware unique to 4th-century Frisia, called "terp Tritzum", showing that an unknown number of Frisii were resettled in Flanders and Kent, likely as "laeti" under the aforementioned Roman coercion.

The lands of the Frisii were largely abandoned by c. 400, probably due to climatic deterioration and flooding caused by sea level rise. They lay empty for one or two centuries, when changing environmental and political conditions made the region habitable again. At that time, settlers that came to be known as 'Frisians' repopulated the coastal regions. Medieval and later accounts of 'Frisians' refer to these 'new Frisians' rather than to the ancient Frisii.
Q35133
Old Frisian
Concept
Q42365
Old English
Concept
Q22633
Germanic tribe
MEDIA
Q923381
Rhine–Meuse–Scheldt delta
LOC
Q1648
River Ems
LOC
Q106416
Frisians
MEDIA
Q24879
Bremen
LOC
Q12994
Bruges
LOC
Q23442
island
Concept
Q1800139
laeti
Concept
Q4492881
Frisia
LOC
Q505963
terp
Concept
Q234
Flanders
LOC
Q23298
Kent
LOC
Q841083
sea level rise
Concept
Q106416
Frisians
MEDIA
Q2769838
Frisii
ORG
Q2769838
Frisii
ORG
Q2769838
Frisii
ORG
Q2769838
Frisii
ORG
Q2769838
Frisii
ORG
Q2769838
Frisii
ORG
Q2769838
Frisii
ORG
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1
NUMBER
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4
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+4^^http://www.w3.org/2001/XMLSchema#decimal
4
NUMBER
subclass of
named after