Christmas Day or birthday of the Lord
A modern American blend of Natalie and the popular suffix -lyn. It ultimately derives from the Latin 'natalis', referring to the birth of Christ, and is traditionally associated with children born on Christmas.
Less common today
Natalyn isn't in the latest US Top 1000. It last peaked at #3,936 in 2013.
US births per 5-year period, 1990βpresent (SSA data).