In my amateur understanding of Hebrew, Shiriel would be unisex, meaning "song of/about/from God," just like
Ariel is unisex in English. You could further feminize it to Shirielle (like
Gabrielle), but "-elle" is a French, feminine, diminutive suffix used in place of the Hebrew "-el."
(It sounds nice. We did the same kind of thing for our daughters.)
"Like arrows in the hands of a warrior are sons born in one's youth." Ps. 127:4
JoHannah Jubilee, BenJudah Gabriel, Aaron Josiah, Jordan Uriah,
Maranatha Nissiah, (Anastasia Nike, 1992-1992), Jeshua David,
Shiloh Joshana, Elijah Daniel, Hezekiah Nathaniel, Zephaniah Joseph