It sounds almost like 'monkey' (English speakers sometimes wonder why we call our Grans monkeys). But the 'g' is very hard: mun-ghee.
Fi cariad fy mamgu (nain).
Mamgu (usually in South Wales) or Nain (in North Wales)
Gorffwys mewn hedd nain a taid. (northern Welsh) Gorffwys mewn hedd mamgu a tadcu. (souther Welsh)
In Irish it's "seanmháthair" In Welsh it's "mamgu" In Scots Gaelic it's "seanmhair"
Spanish: Abuela French: Grand-mère Italian: Nonna German: Oma
It is pronounced as 'gwivir' in Welsh.
gwyn
bach
Draig
cath
'kumree'
The cast of Poncho Mamgu - 2008 includes: Jorge Booth