Oldrich sits next to 4 phonetic neighbors — Ulrich, Oldřich, and Aldric are the closest matches by sound. Most share Oldrich's Germanic cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"to make famous"
"wolf river, valley of the wolf"
"Hugh's meadow or clearing"
"the people, citizen"
"Descendent of Shannon; God is gracious"
"dark one, man from the dark sea"
"magnanimous, the generous one"
"young bear, young animal"
"wise and brave"
"God is my help"
"gift, given"
"Effort; endeavor; to try"
"one who reaches spiritual union"
"the reinforced, the backed"
"bold voyager; brave in journey"
Similar sound: These names share phonetic patterns with Oldrich — similar vowel sounds, consonant clusters, or rhythm.
Rhythm: Oldrich is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.