You need someone identifiable to act as the main point of contact and to have overall responsibility for keeping track of activities involved in the planning and implementation of your event.
Bydd angen dynodi rhywun i weithredu fel y prif bwynt cyswllt ac i fod â chyfrifoldeb cyffredinol am gadw golwg ar weithgareddau sy'n gysylltiedig â chynllunio a gweithredu eich digwyddiad.