Zealand sits next to 4 phonetic neighbors — Zeal, Zeeland, and Ireland are the closest matches by sound. Most share Zealand's Dutch-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sea land"
"blue-purple dye, the color indigo"
"occupational surname for cellar manager"
"creative elaboration of Finn"
"little king"
"place of alder trees"
"the color gray"
"rare, extraordinary"
"to move swiftly, energetic forward movement"
"chain link, connection"
"Greece, Ionia (biblical Javan)"
"shelter, sanctuary"
"staff bearer, wand wielder"
"peaceful ruler"
"worshipper of Yahweh"
"king, sovereign"
"crooked hill"
"one who resembles God"
"impulsive, little king"
"middle of the plain (city name)"
Similar sound: These names share phonetic patterns with Zealand — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Dutch origins, giving them the same cultural heritage as Zealand.
Rhythm: Zealand is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.