Baby Name Poll

We have a little problem, as our daughter’s both have first names beginning with the same letter, but we don’t know if we should use the same letter with our third child. Our daughters are Sage (7) and Skye (3). We die not plan on using the same letter, but we loved both Sage and Skye. For a boy, we have picked out Ember, Chloe, Stella or Scout for a girl and Hudson, Gavin, Sawyer or Silas for a boy. Our question is do we go for the S names just to make sure this child doesn’t feel left out or go with a different lettered name? Other suggestions welcomed. Thanks.