Sibling for Henry?

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My son’s name is Henry, named after a long line of Henrys in our family. In thinking about a brother or sister, we are stuck in finding a name that “goes” with Henry. I know names don’t need to “go” but we would like them to flow nicely. Any thoughts? We don’t have a lot of preferences really. If Henry had been a girl she may have been Ellyson or Anistyn but we weren’t sold on either. We didn’t consider any other boy names. Thanks so much!!