Madden sits next to 5 phonetic neighbors — Aidan, Caden, and Hayden are the closest matches by sound. Most share Madden's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"descendant of Madan (little dog)"
"heathland, open moorland"
"high, noble"
"warrior, strong fighter (fan interpretation)"
"hollow, ravine"
"wisdom, good sense"
"pure, innocent, righteous"
"growth, abundance"
"dweller near the ridge"
"God will uplift (from Jeremy/Jeremiah)"
"prince's town"
"from the city of lions"
"world-encircling waters"
"stone worker (via Mason)"
"appointed, placed by God"
"oarsman"
"from the city of Dax"
"son of Neil, son of the champion"
"I believe (credo)"
"sun, like the sun"
Similar sound: These names share phonetic patterns with Madden — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Madden.
Rhythm: Madden is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.