Ember is too modern sounding for me, but I understand about the flow of Emily and Josephine together.
Audrey Seraphina is gorgeous! Audrey is one of my favorite names. If it wasn't for the popularity, I'd use it as a FN. Don't like Arabella though. Not a fan of Hardy, but it could work in the middle spot if paired with a decent FN.
Opinions on Maia/Maija Elizabeth and Jānis (YA-nis)? Maija is the Latvian spelling of Maia which is from Greek mythology. I prefer both over Maya or the horribly Mya. Elizabeth honors my great-aunt and is my mom's confirmation name. Jānis honors a relative in Latvia and my mom Janet. I'm not sure of a middle name.