Hattie sits next to 5 phonetic neighbors — Mattie, Patty, and Haddie are the closest matches by sound. Most share Hattie's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"home ruler"
"pledged to God"
"Yahweh saves"
"bell ringer"
"Exclamation of triumphant discovery"
"dwelling place"
"writer, creator of works"
"slender; narrow passage"
"modern American coinage; possibly echoing Lateran (the Roman hill)"
"farm garden, upper estate enclosure"
"Noble, patrician (via Patrick)"
"merciful, gracious"
Similar sound: These names share phonetic patterns with Hattie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic (via Harriet) origins, giving them the same cultural heritage as Hattie.
Rhythm: Hattie is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.