Johnna \jo(hn)-na\ as a girl's name is pronounced JAH-nah. It is of Hebrew origin, and the meaning of Johnna is "God is gracious". Feminine form of John and Jon. May also be used as a contraction of Johanna.
Johnna has 26 variant forms: Giana, Gianna, Giovanna, Jana, Janna, Johna, Johnelle, Johnetta, Johnette, Johnnae, Johnnie, Jonae, Jonalyn, Jonalynn, Jonay, Jonell, Jonetta, Jonette, Joni, Jonita, Jonna, Jonnae, Jonnelle, Jonni, Jonnie and Jovanna.
For more information, see also the related name Jane.