Gracious
Jeni is a diminutive form of Jennifer, which itself is the Cornish form of the Welsh name Gwenhwyfar. It ultimately shares roots with the Hebrew name Yohanan, meaning 'God is gracious'. While often used as a nickname, it has a history of independent use as a shorter, modern alternative.
Less common today
Jeni isn't in the latest US Top 1000. It last peaked at #2,456 in 1991.
Founder of Jeni's Splendid Ice Creams
Irish actress known for The Secret of Roan Inish
US births per 5-year period, 1990βpresent (SSA data).