This could be because they arrived here many years ago and were not told they needed certain paperwork, such as the Windrush generation.
Gallai hyn fod oherwydd iddynt gyrraedd yma flynyddoedd lawer yn ôl, megis y genhedlaeth Windrush, heb i neb ddweud wrthynt fod angen gwaith papur penodol arnynt.