Thanks for your replies. Actually, James is one of the names that my husband and I were discussing. I realize that Hezekiah may be a mouthful, but if you think about it has the same amount of syllables as Elizabeth and so many people are naming their girls Elizabeth. We love the name Hezekiah...we have 5 girls all with H names and wanted another H name that we really liked for our little boy. Girls names are...Heather, Haley, Heidi, Hannah & Hope.
With those lovely girl names, in my opinion Hezekiah just doesn't fit. Some other H boy names:
Otherwise, of the suggestions mentioned, I really like James as a middle name. It flows well with Hezekiah, and is an option your son could use to go by should he not want to go by Hezekiah.