Jilliyn is an uncommon, unique feminine given name of American origin. It appears to be a blend of the names Jill andilyn, with the latter being derived from the male name Hilton but used here as a distinct female name element. Jilliyn is not recorded in any significant number of births, making it quite distinctive among its peers.
"The name Jilliyn experienced a brief peak in popularity between 2004 and 2007 with an average of 6 births per year, but it has since declined, with only 5 births recorded in 2009."