Which one is best?
My other kids are Holden, Sawyer and Izabella
I think that Kellan goes best with your other children's names, but of the names you listed, Milo is my favorite!
I also voted for Kellan and Milo! They fit well with your sibset and style. August would be my third choice.
I love Graham but I also like Finn and I also think Kellan works with your names!
I was looking for names with similar weight and different endings, so I went with August and Graham.