(Welsh) From the starlight Serin, Seran, Seron, Serun
(American) A fateful meeting; having good fortune Serendipitey, Serendipitee, Serendipiti, Serendipitie, Serendypyty... serendipity
(English) Serene, calm, peaceful Serenitie, Serenitee, Serepta, Serina, Sereana, Serena, Serenah, Serene, Sereena, Seryna... serenity