Where does “Ostfriesland” come from?

Ostfriesland (German) comes from German Friesland, from German land, from Middle High German lant, from Old High German lant, from Proto-West Germanic land, from Proto-Germanic landą, from Proto-Indo-European lendʰ- — land, heath; loins.

Ancestry of “Ostfriesland”, step by step

Ostfriesland traces back through two separate lines of ancestry.

via German Friesland

StepLanguageWordMeaning
1GermanFrieslandFrisia
2Germanlandcountry territory of a nation
3Middle High Germanlantland; country
4Old High Germanlantland; country
5Proto-West Germaniclandland, area of ground
6Proto-Germaniclandąland, area of ground
7Proto-Indo-Europeanlendʰ-land, heath; loins

via German Osten

StepLanguageWordMeaning
1GermanOstenEast; The territory of the former GDR
2Old High Germanostan
3Proto-Germanicaustrąeast; east, eastward
4Proto-Germanicaustrazeast, eastern
5Proto-Indo-European*h₂éwsterosin the direction of dawn, east
Every word from Proto-Indo-European lendʰ-Every word from Proto-Germanic landąEvery word from Proto-West Germanic land