Baby Number 4 Name??

I am planning out names for baby number 4!! We know it will be a BOY!! I am having a hard time figuring out name ideas for him. Here are his siblings names:

1. Topanga Monroe Lawrence (girl)

2. Haytham Grey Lawrence (boy)

3. Lennon Eloise Lawrence (girl)

We love the name August but are struggling to find a good middle name, I like Ezra but my husband thinks it’s just okay and I also can’t think of a good middle name. HELP!