Modern invented name, likely combining Jay and Lynn
Jailynne is a contemporary American creation. It most likely functions as a compound name, blending the prefix 'Jai' (often derived from the bird name Jay or the Sanskrit word for victory) with the popular suffix 'lynne', which stems from the Welsh word for lake.
Less common today
Jailynne isn't in the latest US Top 1000. It last peaked at #8,794 in 1999.
US births per 5-year period, 1990βpresent (SSA data).