gosteg
gostegu
gostwng
gostyngedig
gostyngeiddrwydd
gostyngiad
gostyngiadau
Gotheg
Gothenbwrg
Gothiaid
gotoyw
Gottfried Wilhelm von Leibniz
Goulburn
Gourde Haiti
gourde Haiti
Goursez Vreizh
Gozo
GP de Plouay
GQE
Grace
Grace Williams
Gracie
grad Celsiws
gradd
graddau
graddau canradd
graddau Celsius
gradd C
graddedig
graddedigion
gradd F
graddfa
gradd Fahrenheit
graddfeydd
graddiannau
graddiant
graddio
graddliw
graddliwiau
graddliwio
graddlwyd
graddnodi
graddol
graddoli
gradell
graean
graeanu
graeanwst
Graeme
graen
Cymraeg