Old English 
Unknown origin. Perhaps from Proto-Germanic *dukkōn (“power, strength, muscle”) + diminutive suffix -ga, probably meaning “little dynamo” in the original sense. Akin, if so, to Old English -docce (“muscle”) (compare fingerdocce (“finger-muscle”)).
Alternative forms 
- IPA: /ˈdod͡ʒa/
docga m (nominative plural docgan)
- Only attested once, glossing Latin canis.