in English is:

Whitsun

,

Pentecost

Mutations

Soft:(no mutation)
Nasal:(no mutation)
Aspirate:(no mutation)

Use

y Sulgwyn hwn
fy Sulgwyn i
dy Sulgwyn di
ei Sulgwyn ef/o
ei Sulgwyn hi
ein Sulgwyn ni
eich Sulgwyn chi
eu Sulgwyn nhw/hwy
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