Izak sits next to 5 phonetic neighbors — Isaac, Isaak, and Izaak are the closest matches by sound. Most share Izak's Hebrew-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"he will laugh, laughter, one who laughs"
"of the coin, of money"
"people of the riverside forest"
"brave, vigorous power"
"modern coinage; possibly town settlement"
"victory of the people (via Nicasen interpretation)"
"magnificent one"
"fortified stronghold"
"salvation of the Lord"
"edge, border of land"
"red-haired, little red one"
"God heals, God supports"
"God is salvation"
"immortal, eternal"
"palm tree, upright"
"light"
"dweller at the white cultivated land"
"warrior"
"vivid, alive"
"son of one with a bright mind"
"brave as a lion"
Similar sound: These names share phonetic patterns with Izak — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Izak.
Rhythm: Izak is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.