Janice

Variant of Jane under apparent influence from Alice, Bernice, Eunice, etc., from French Jeanne, from Middle French Jehanne, from Medieval Latin Johanna, variant of Latin Ioanna under influence from Latin Iōhannēs, from Koine Greek Ἰωάννα (Iōánna), from Hebrew יוֹחָנָה (Yôḥānāh, literally “God is gracious”), the feminized form of יְהוֹחָנָן (Yəhōḥānān) which produced John and its many doublets. As a placeholder name, cf. similar use of John and Jack and earlier use of Joan in the same role. Doublet of Ivana, Jana, Janis, Jean, Jeanne, Jen, Joan, Joanna, Joanne, Johanna, Juana, Shavonne, Sian, Siobhan, Shane, Shaun, Shauna, and Sheena.

来源：wiktionary