Language/Volapuk/Grammar/Possessives

Possessives are expressed by either form of the genitive case.

• Flen de hipul or flen hipula ‘the boy’s friend’
• Nems de sörs or nems söras ‘the sisters’ names’
• Tood de fat obik or tood fata obik ‘my father’s car’

Source: http://www.xn--volapk-7ya.com/quick-look-at-volapuk.html