Island sits next to 3 phonetic neighbors — Ireland, Isla, and Isabel are the closest matches by sound. Most share Island's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"land surrounded by water"
"from Colette or Nicole"
"possibly related to Eliza (my God is an oath)"
"ruler of elves (Avery root)"
"to worship, to cherish"
"made of linden wood, gentle and protective"
"my God is an oath"
"one who lives near a brook or stream"
"clear, bright, famous"
"harmony, consonance, fitting together"
"orange tree, orange blossom"
"nation, community"
"of the lake, water"
"first growth of spring"
"rose or lily flower"
"flowing water, to drip or trickle"
"the victorious (if from Cairo)"
"tree, oak tree"
"shining with glory"
"wind, breath"
"home of the gods"
Similar sound: These names share phonetic patterns with Island — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Island.
Rhythm: Island is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.