Icarus sits next to 5 phonetic neighbors — Marcus, Darius, and Lazarus are the closest matches by sound. Most share Icarus's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"uncertain — possibly related to the island of Ikaria"
"the color red"
"descendant of the dark one"
"young warrior"
"cushion (alternative Irish etymology)"
"a days travel; a trip"
"one who does not follow the herd"
"from the wooded hollow"
"he has given, gift of God"
"great house"
"from the Cayman Islands"
"dark, black"
"beloved"
"victory of the people"
"son of Hermund"
"lord, my lord"
"beloved of Yahweh"
"stranger, guest, foreigner"
"appointed by God"
"spear"
"the ruby gemstone"
Similar sound: These names share phonetic patterns with Icarus — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Icarus.
Rhythm: Icarus is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.