One of the oldest English words recorded is Anglii used first in the year 98 AD by Roman historian Gaius Cornelius Tacitus (ca. 56-120 AD)
Anglii i.e “the Angles,” literally “people of Angul” (Old Norse Öngull).
Tacitus wrote in 98AD in his book ‘Germania’ about the various Teutonic tribes he came into contact with including the Angles. These tribes would invade Britain 300 or so years later and form the kingdoms of Mercia, Northumbria and East Anglia in 5th Century Britain.
“There follow in order the Reudignians, and Aviones, and Angles, and Varinians, and Eudoses, and Suardones and Nuithones; all defended by rivers or forests. Nor in one of these nations does aught remarkable occur, only that they universally join in the worship of Herthum (Nerthus); that is to say, the Mother Earth.” — Tacitus (98 AD) De Origine et situ Germanorum
Angeln: A Germanic settlement on a fish hook shaped peninsula
The word Anglii is a comes from a settlement in Germany called Angeln (now known as Schleswig-Holstein), which geographically is shaped like an angled fish hook. This place name and hook shaped peninsula in Germany is also where we get the word for a fishing enthusiast – Angler. It is also highly likely that the seafaring Angles were known as fishing people and so the name stuck.
Proto-Indo-European “Ank”: meaning to bend
Angler (fisherman)/Angles(Germanic tribe) /Angeln (place in Germany) hark back to an older word in Proto-Indo-European “Ank” which means to bend. From this word we get the Latin for Ankle and also Anchor.
Proto-Germanic: “Anguz” meaning narrow, which might refer to the shallow coastal waters of this region of Germany.
Land of Ængle/England
It was the Angles, not the Saxons or the Jutes from this period who first wrote down their Germanic dialect, which is (part of the reason) why we commemorate the ancient words Anglii/Angle/Angeln and the place name of the Land of Ængle England/English.