Aleksander sits next to 4 phonetic neighbors — Alexander, Alejandro, and Alastair are the closest matches by sound. Most share Aleksander's Polish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"defender of men"
"victors garland"
"priceless, praiseworthy"
"who is like God? (rhetorical — implying no one)"
"to tame, subdue"
"God is gracious"
"trickster, shapeshifter"
"peaceful ruler"
"god spear"
"sky, heavens"
"yew warrior, bow warrior"
"treasurer, keeper of treasure"
"peaceful ruler"
"sweet-smelling resin"
"order, universe"
"home ruler, lord of the house"
"follower of Dionysus, god of wine"
"father of peace"
"farmer, earth-worker"
Similar sound: These names share phonetic patterns with Aleksander — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Aleksander.
Rhythm: Aleksander is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.