Izzy sits next to 4 phonetic neighbors — Izzie, Lizzie, and Missy are the closest matches by sound. Most share Izzy's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is my oath"
"fame, renown, honor"
"gracious, pleasant"
"gentle, beautiful, precious"
"bright settlement, Beorthelm's town"
"vine, climbing plant"
"descendant of the dark-eyed"
"without equal; matchless"
"wished-for child (from Evelyn)"
"place by the sea (Moorish origin)"
"commander, sovereign"
"blessing"
"noble, of noble kind"
"poet, bard"
"noble and kind"
"eternal flower, forever flowering"
"spiritual ecstasy"
"descendant of Raghallach"
"best, excellent"
"May God protect"
"short form of Antonia/Antoinette"
Similar sound: These names share phonetic patterns with Izzy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Izzy.
Rhythm: Izzy is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.