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- Bridie Gallagher
- Fhiona Galloway
- F Gareth
- Ceri-Anne Gatehouse
- Lisa Genova
- Beti George
- Eirwyn George
- Mari George
- John Geraint
- Rebecca Gerlings
- Alun Gibbard
- Alun a Gibbard
- Howard a Gibbard
- Rob Gittins
- Carys Glyn
- Gwyneth Glyn
- Ifor ap Glyn
- Peredur Glyn
- Becky Goddard-Hill
- Llewellyn Goff
- Ed Gold
- Steven Goldstone
- Rob Goodfellow
- Emma Goswell
- Ian Gough
- Kevin Gournay
- John Gower
- Jon Gower
- Onwy Gower
- The Students of Limpsfield Gr
- Dr Nori Graham
- Oakley Graham
- Emily Gravett
- Andrew Green
- Jen Green
- Rhiannon Gregory
- Louise Greig
- Mary Griese
- Euron Griffith
- Gwenfair Griffith
- Hywel Griffith
- W.J. Griffith
- Alaw Griffiths
- Angharad Griffiths
- David Griffiths
- Dewi Griffiths
- Gilmor Griffiths
- Hywel Griffiths
- John Alwyn Griffiths
- Peter Griffiths
- Rhidian Griffiths
- Robert W. Griffiths
- Stella Griffiths
- Ffion Heledd Gruffudd
- Heini Gruffudd
- Robat Gruffudd
- Anna Gruffudd-Fleming
- Nia Gruffydd
- Stella Gruffydd
- Wyn Gruffydd
- Dafydd Guto
- Bethan Gwanas
- Lleucu Gwenllian
- Gwynn ap Gwilym
- Llywelyn ap Gwilym
- Jenkins Gwyn
- Richard Gwyn
- Telor Gwyn
- John Gwynne