Where does “Jenna” come from?

Jenna (Finnish) comes from Finnish Jenni, from English Jenny, from English Janet, from English Jane, from French Jeanne, from Old French Jehane, from Medieval Latin Johanna, from Latin Joanna — God is gracious.

Ancestry of “Jenna”, step by step

StepLanguageWordMeaning
1FinnishJenni
2EnglishJennyA Wren; A Curtiss JN-4 airplane
3EnglishJanetA highly classified fleet of passenger aircraft used to transport the military and contractors
4EnglishJaneA woman, often specifically a girlfriend;...
5FrenchJeanneJane, feminine of John
6Old FrenchJehane
7Medieval LatinJohanna
8LatinJoanna
9Ancient GreekἸωάννα
10Hebrewיוֹחָנָה
11HebrewיוֹחָנָןGod is gracious
12HebrewיְהוֹחָנָןGod is gracious
Every word from Hebrew יְהוֹחָנָןEvery word from Hebrew יוֹחָנָןEvery word from Hebrew יוֹחָנָה