Twageos is a place name incorporating the common Norse place name element 'gjá', meaning 'ravine' and rendered in Shetland as 'geo' or 'gjo'. Twageos may refer to the 'two ravines'.
Midgarth is a common Norse placename, and Anglicisation of Miðgarðr, meaning in this case 'Middle Enclosure / Farm' . Miðgarðr is also the 'Middle Realm', and home of mankind, in Norse Mythology.