Jeannie is a feminine name and a petform of Jeanne, a variant form of Jechonan (יוחנן).
It is ultimately originated from the Hebrew masculine name (יְהוֹחָנָן) Jehohanan or (יוֹחָנָן) Yohanan meaning 'God is gracious' or 'The Lord gives mercy'.
Jeannie may be a nickname of Jeannette.
It is considered a great and lucky name for a baby girl in different cultures.
It may also be used as the feminine version of John or Jimmy.