Take your choice. All these memorials are celebrated November 21:
Albert of Louvain
Amelberga
Celsus
Clement
Columbanus Junior
Demetrius
Digain
Eoin O'Mulkern
Eutychius
Gelasius I
Gelasius O'Cullenan
Heliodorus
Hilary
Honorius
Honorius
Maurus
Nicholas Giustiniani
Presentation of the Blessed Virgin
Rufus of Rome
Stephen
I can find no reference to a St. Colin. However, there was a Saint Collen whose feast day is May 21. He is not a patron saint.
The following saints are memorialized on November 21:Albert of LouvainAmelberga of SusterenCelsus the MartyrClement the MartyrDemetrius of OstiaDigainEoin O'MulkernGelasius IGelasius O'CullenanHeliodorusHilaryHonorius of AstaHonorius of OstiaMaurus of VeronaPresentation of the Blessed VirginRufus of Rome
Thomas was canonized on February 21, 1173, by Pope Alexander III.
Saint Anges' symbol is a lamb. If anyone was wondering she is the patron saint of chastity, gardeners, girls, engaged couples, rape victims, and virgins. Her Feast day is January 21.(day she died) Born 291 died 304!
Bjork was born on November 21, 1965
Guy Saint-Vil was born on 1942-10-21.
The feasts of the following saints are celebrated on September 21:Alexander of the Via ClaudiaFrançois JaccardGerulphHieuImbertIphigeniaIsaac of CyprusJohannes RiLandelin of EttenheimmunsterMark ScalabriniMatthew the ApostleMaura of TroyesMeletius of CyprusMichael of TsjernigovPamphilus of RomeTheodore of TsjernigovThomas Dien
Nicollette Sheridan was born on November 21, 1963
The following saints are memorialized on October 21 every year:AgathoAstericusBertholdCaiusCharles of AustriaCiliniaCondedusDasiusFinian MunnuFinton of TaghmonGebizoGundisalvus of LagosHilarion of GazaHugh of AmbronayImana of LossJohn of BridlingtonLaura of Saint Catherine of SienaMalchusMaurontusPeter of Città di CastelloTudaUrsulaViatorWendelin
Peter of Saint Joseph Betancur was born on 1626-03-21.
Afa Anoai was born on November 21, 1942, in Samoa.
Columbanus of Bobbio died November 21, 615 in a cave at Bobbio, Italy of natural causes.