The story
- Old English · derived fromgrēne + beorg“green hill”
- English todayGranborough
From Old English grēne + beorg (“green hill”), recorded as Grenebeorge c.1060 and Grenesberga in 1086 (DB), and Grandborough c.1600, which was revised to Granborough in the 20th century (between 1930 and 1968 on OS maps).
Etymology from Wiktionary, CC BY-SA 4.0.