The name Adecyn is a girl's name meaning "son of Adam". Adecyn and is often added to lists like Baby Names Sure to Shock Grandma and discussed in our forums with posts like "10 Children Quiz (small namebanks with the 'names searched right now' names)".
From the experts:
As soon as a name becomes mega-popular, parents start to look for spelling variations to set their child apart. This is one of the less graceful ones.