I second [name_u]Eden[/name_u], which is a unisex name.
You could also do [name_u]Danny[/name_u] or [name_u]Dani[/name_u] to represent [name_m]Daniel[/name_m].
They are using [name_u]James[/name_u] (name of two biblical apostles, meaning “supplanter”) and [name_u]Noah[/name_u] as unisex names now. [name_u]Blake[/name_u] Lively and [name_u]Ryan[/name_u] [name_m]Reynolds[/name_m] named their daughter [name_u]James[/name_u]. These might be a good middle names!
Others:
[name_u]Abbott[/name_u], meaning father (as in Father God)
[name_u]Asa[/name_u], name of a biblical king of [name_m]Judah[/name_m], and means “born in the morning”
[name_u]Elisha[/name_u], prophet, disciple of [name_m]Elijah[/name_m]–meaning “God is my salvation.”
[name_m]Ezra[/name_m], who led a group of 1500 israelites out of slavery in Babylon and back to Jerusalem; meaning “help.”
[name_u]Jaden[/name_u], a varient of [name_u]Jadon[/name_u], a repairer of the walls of Jerusalem; meaning “God has heard.”
[name_u]Jesse[/name_u], father of [name_m]King[/name_m] [name_m]David[/name_m], meaning “gift”
[name_u]Jude[/name_u], diminutive of [name_m]Judah[/name_m], who was the son of [name_m]Jacob[/name_m], and a leader of a tribe of [name_m]Israel[/name_m]. Also worn by [name_m]Saint[/name_m] [name_u]Jude[/name_u], who interceded for people with problems and became the patron saint of lost causes. [name_u]Jude[/name_u] means “praised.”
[name_u]Jordan[/name_u], the river in which [name_m]Christ[/name_m] was baptized by [name_m]John[/name_m] the Baptist. It means “flowing down.”
[name_u]Micah[/name_u], the prophet that denounced oppression by the ruling classes; meaning “who is like the [name_m]Lord[/name_m].”
[name_u]Paz[/name_u], the Hebrew word for “peace.”
[name_u]Sam[/name_u], deriving from [name_m]Samuel[/name_m], who was one of the great judges and prophets of the Israelites, destined for holy life since birth. He anointed [name_m]Saul[/name_m] and [name_m]David[/name_m] as kings; meaning “told by God.”
[name_u]Shay[/name_u], a transliteration of the Hebrew word for “gift.”
[name_u]Shiloh[/name_u], a biblical city in [name_m]Israel[/name_m] that housed the tabernacle where the Ark of the Covenant was kept; meaning “tranquil.”
[name_u]Zion[/name_u], biblical place-name meaning “highest point.”
I hope this helped! My favorite combinations are [name_u]Eden[/name_u] [name_u]Micah[/name_u], [name_u]Shiloh[/name_u] [name_u]Jude[/name_u], [name_u]Jordan[/name_u] [name_u]Elisha[/name_u], [name_m]Ezra[/name_m] [name_u]Zion[/name_u], or [name_u]Micah[/name_u] [name_u]Shay[/name_u].
Please let us know whichever name you choose, and God bless you.