I thought of another reason to go with Hannah Rose; the day or day after she is born, your husband can take her two big sisters to a garden shop or nursery and buy a rose bush that's blossoming or budding then. They can take it home and plant it and call it "the Hannah rose," and it'll bloom every year on her birthday or thereabouts!

My mother's birthday was in June, and there is a rose bush at my parent's house that was taken from the one at HER parents' house that blooms every year at that time (give or take major droughts or late springs). She carried flowers from it for her wedding (which was on her birthday as well). I didn't know it was true of all rose bushes until I met a gardener who was going to buy one for a wedding present for that reason.