I could be overthinking this.
Unique middle names for harper. Traditionally dads have a preference for strong classic or he-man names for their sons such as Chri. I think for a middle name Grace is perfect. Middle names for boys sometimes languish in the shadows as parents strive for the perfect baby nameBut whether its for a baby boy or a baby girl the middle name offers both lots of space to be both wildly creative or to pay homage to historyWhen considering a baby boys middle name some parents choose Moms maiden name or seek to appease family members who are.
It seems to work with any of the middle names that you are considering. I like Harper Kate. The best middle name for Avery is the one that works well with the first and last name.
I tend to like short middle names for boys better but nothing wrong with long ones. Our last name is Randolph if that helps. For girls I like elegant names as middle names.
Others are common first names but hardly used in the middle. One who dwells in the plains. Its been in use since the 19th century.
Short sweet middle names are the key to popular two-part Southern names like Celia Mae or Anna Luz. Two unisex names like Harper Emerson makes it difficult to tell. To have something either short and or more feminine to flow well.
Pair these with a 2-3 syllable first name and you will probably find yourself calling your daughter by both her first and middle name even when shes not in trouble. Ada Nigerian origin means first daughter Alea. If you think the name Harper is overused Hadley is a very fashionable alternative.