Infinity sits next to 3 phonetic neighbors — Serenity, Trinity, and Destiny are the closest matches by sound. Most share Infinity's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"endless, boundless, without limit"
"good race, noble kind"
"graceful clearing"
"my God is an oath, pledged to God"
"bitter waters (place name from Exodus)"
"grace, eternal"
"my father is joy"
"dark-haired, dark complexion"
"of the Cornelian gens"
"wished-for child"
"precious green stone"
"covered in mist, hazy"
"dwelling near a cross"
"beloved sky"
"peaceful sky"
"leaping waters, running water"
"priest's cottage"
"gift of God"
"invented blend of Nash and Ashley"
"sweet confection"
"day, brightness"
Similar sound: These names share phonetic patterns with Infinity — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Infinity.
Rhythm: Infinity is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.