Elspeth sits next to 3 phonetic neighbors — Elizabeth, Elspet, and Elsbeth are the closest matches by sound. Most share Elspeth's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pledged to God, God is my oath"
"Fierce protector with noble bearing"
"beautiful one"
"compound of grace and flower"
"symbol of peace and wisdom"
"joyful lake"
"bright meadow, bright clearing"
"pearl or bitter (Mae component)"
"gentle, soft"
"son of Maud, mighty in battle"
"lioness, brave as a lion"
"bright, shining one"
"tortoise, ancient clan"
"noble, of noble birth"
"Diminutive of Lucia (light)"
"musical harmony; combination of notes"
"judged by God, under divine judgment"
"son of Matthew, gift of God"
Similar sound: These names share phonetic patterns with Elspeth — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew (via Scottish) origins, giving them the same cultural heritage as Elspeth.
Rhythm: Elspeth is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.