As a middle name, I'd say Suzanne. Jenna Suzanne. As a sister, I'd say Rachel. Jenna and Rachel.
Jenna Nair apparently
arend
Arend
Santos.
Selena
no cause Jenna is better expressly Jenna Boutilier
Arend
Arend
sarah, jenna, lydia, or makayla
Jenna Louise Hawkins Welch.
Jenna Dolan's birth name is Jenna Hahn.