Sonora sits next to 3 phonetic neighbors — Nora, Lenora, and Aurora are the closest matches by sound. Most share Sonora's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sonorous, resonant, pleasant-sounding"
"sun, sunlight"
"fair hero's descendant"
"man of God, messenger"
"from Lourdes, place of miracles"
"grace, favor (from Anna/Hannah)"
"invented/unique"
"truth, unconcealedness"
"alive, full of life"
"light, illumination"
"flowing water"
"the victorious (if from Cairo)"
"the Lord is gracious"
"beloved"
"bird"
"lace (fabric association)"
"olive, peace"
"star-shaped flower"
"God is my strength"
"friendship, harmony"
Similar sound: These names share phonetic patterns with Sonora — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin/Spanish origins, giving them the same cultural heritage as Sonora.
Rhythm: Sonora is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.