Hades sits next to 4 phonetic neighbors — Hayes, Aides, and Cadiz are the closest matches by sound. Most share Hades's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"the unseen"
"consecrated, majestic"
"deep blood-red color"
"tranquility, harmony"
"warrior (via Irish Kane)"
"swift, decisive attacker"
"the river that swallows all rivers (from Zaire/nzadi)"
"geographic name from ancient Gaulish"
"lapis lazuli (the stone)"
"estate by the cliff"
"modern invented name combining Zay and lyn"
"God strengthens"
"lake, calm water (via -lyn)"
"tube, channel"
"friend, companion"
"God is perfect, Yahweh is upright"
"spear ruler"
"child born at a prosperous time"
"to be, to exist, present"
"gracious, merciful"
Similar sound: These names share phonetic patterns with Hades — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Ancient Greek origins, giving them the same cultural heritage as Hades.
Rhythm: Hades is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.