Too many L sounds if you do any of those combinations. Also, don’t just go for what sounds ‘pretty’, make sure you can say the name while angry. I know people may not necessarily like that idea, but you’ll be saying the name for the rest of your life and not always in a soft happy voice.

Since Delilah is a longer syllable name, I think a one syllable name would flow best (unless your last name is one syllable). If multi-syllable middle names sound best with your last name, I would pick either of the two-syllable ones.

I think something with one syllable would work best given it’s already got three in the first name. Rose? Mae? (My middle name so I’m bias 🤣) Rae?

I think the middle name Iris would be beautiful with it.

I agree with the others comments. Delilah would flow better with a shorter one or two syllable name. Rae, anne, Marie, rain, Mae, just a couple examples

Delilah Corrine Delilah Rain Delilah Winter Delilah Rose Delilah Renee Delilah Grace Delilah Autumn

delilah rose delilah leedelilah belle delilah maree delilah mae

I think May or Mae would sound nice with Delilah