Lukasz sits next to 4 phonetic neighbors — Lucas, Luke, and Lukas are the closest matches by sound. Most share Lukasz's Polish-origin cluster, so the rhythm and vowel shape carry across the list.
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"light, illumination"
"in God's honor"
"defender of the people"
"divine justice"
"gift of God"
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"giant, honorable"
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Similar sound: These names share phonetic patterns with Lukasz — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek/Latin origins, giving them the same cultural heritage as Lukasz.
Rhythm: Lukasz is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.