Middle names?

Looking for unique middle names, so nothing that's popular for first names or middle names right now. ( Like Leigh, Rae, Marie, grace, rose, Everly, Mae, etc) also staying away form unisex names, looking for purely feminine names. We like older names already, we have a son named Henry Darrel, this one will be Violet most likely unless we find another name. We just aren't into the popular names right now nor do we want a middle name that's commonly over used for girls. Hubby has already said no to Opal and Pearl since he says it sounds more like you're just stating the color of the item. (A Violet Opal, A Violet Pearl) so those old names are already pre-vetoed by him but I'm seriously struggling here.