Johnathan is of Hebrew origin, meaning 'God is gracious'. It is a variant spelling of Jonathan, which also shares the same meaning. The name first appeared in the Bible as the name of King Saul's son and a close friend of David. Over time, it has evolved to include several variants such as Jonathon, Johathan, and Jonnathan.
"The name Johnnathan experienced fluctuations in popularity over the years, with peaks in the early 1990s and again around 2007-2010, totaling 289 births from 1977 to 2019."