Arlynn Is A Feminine Gaelic Name With Mysterious Origins, Meaning “oath.” Arlynn May Be A Respelling Of The Irish Gender-neutral Name, Arlen. Arlynn Is Also Considered A Variation Of Arlene, Which May Come From Names Like Marlene And Charlene. Arlynn Has An Elegant Simplicity To It That Will Grant Baby The Freedom To Express Their Unique Style. If Keeping Promises Is Near Your Heart And You Wish To Instill This Value In Baby, Arlynn Is A Great Start.