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"
"worshiper of God"
"street"
"olive tree, peace"
"descendant of the dark one"
"son of grace, son of good fortune"
"edge of a shield"
"firebrand, son of Tye"
"slender, graceful"
"noble watchman"
"God has heard (from Ja-/Jacob root) + spirit of battle (from Kayden)"
"slender warrior (Celtic phonetic elements)"
"eighth, born eighth"
"God will uplift"
"one who works the earth"
"God will establish (variant of Jacob)"
"winding riverbank, bank with a winch"
"beloved"
"belonging to Artemis"
"the sacred crop"
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.