Ruthann sits next to 4 phonetic neighbors — Ruth, Ruthanne, and Luann are the closest matches by sound. Most share Ruthann's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"grace or favor (Ann component)"
"woman of Jerusalem/Solomon"
"from céilí, traditional Irish dance gathering"
"kindness, support"
"woodland, of the forest"
"narrow strait, channel"
"diminutive of Zora meaning dawn or aurora"
"modern American invented name"
"of God, belonging to the divine (from -iyah suffix)"
"tree bower, shaded alcove"
"oak tree"
"modern elaboration of Zora"
"summer"
"peaceful, gentle"
"modern variant of Hazel"
"life of Zeus, force of Zeus"
"defender of the people"
"modern combination name (Kay + Lee)"
"whole, universal power"
"church"
"modern invented name, possibly of the forest"
Similar sound: These names share phonetic patterns with Ruthann — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Ruthann.
Rhythm: Ruthann is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.