December 6 is the feast day of what saint?

The following saints are memorialized on December 6:

Abraham of Kratia

Aemilianus the Martyr

Angelica of Milazzo

Asella of Rome

Boniface the Martyr

Dativa the Martyr

Dionysia the Martyr

Gerard of La Charite

Gertrude the Elder

Giuse Nguyen Duy Khang

Gregorio Cermeno Barcelo

Ireneo Rodriguez Gonzalez

Isserninus of Ireland

Janos Scheffler

Leontia the Martyr

Luisa Maria Frias Canizares

Majoricus the Martyr

Maria del Carmen Salles Barangueras

Narciso Pascual y Pascual

Nicholas of Myra

Peter Paschal

Polychronius

Tertus

Vicente Vilumbrales Fuente

Constantine of Scotland