Christmas Day or birthday of the Lord
Nathalya is a modern, stylized variant of Natalia. It derives from the Latin phrase 'dies natalis', which specifically refers to the birth of Christ, making it a traditional choice for girls born during the Christmas season.
Less common today
Nathalya isn't in the latest US Top 1000. It last peaked at #7,779 in 2010.
US births per 5-year period, 1990βpresent (SSA data).