Here is a web site for Greek Names Days. http://www.namedays.gr/index_uk.htm
There are some Names which will have more than one day to choose for their celebration.
Sometimes that is because the one day is for the SAINT XYZ and the other day would be for the MARTYR XYZ.
And sometimes there might be two saints with the same name; their celebration days might be at different times - as is the case with SOZONE.
Maybe more than you need to know but at least this site will help if you have questions about additional names.