When was she born and how did a sung letter 'Glan Rhondda' (On the banks of the Rhondda) to a brother far away, grow up to become the anthem we know and love today?
Pryd gafodd hi ei geni a sut wnaeth cân o’r enw Glan Rhondda i frawd ymhell i ffwrdd, ddatblygu i fod yr anthem rydyn ni’n ei hadnabod a’i charu heddiw?