Sinead

Anglicization of Irish Sinéad, from Old Northern French Jeanette, from Middle French Jehanne + -ette, 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.
Doublet of Ivanka, Jan, Janelle, Janet, Janey, Janine, Jeanette, Jeanie, Jeannette, Jeannine, Jen, Jenna, Jenny, Jessie, Jo, Jody, Juanita, Shanae, Sioned, and Vanna.