Irving sits next to 4 phonetic neighbors — Irvin, Erwin, and Melvin are the closest matches by sound. Most share Irving's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"green river, fresh water"
"selected, chosen one"
"universal, whole"
"people's champion, victorious one"
"chicken (separate Dutch usage)"
"rush plant (marsh grass)"
"Greece, Ionia (biblical Javan)"
"growth, abundance, increase"
"the Nubian, dark-skinned"
"God has given"
"peaceful, tranquil"
"alder tree"
"wooded land"
"defender of men"
"lion-hearted, brave"
"descendant of the black-haired one"
"youth, young warrior"
"invented name, possibly faithful or gentle"
"from Leicester"
"just, righteous, upright"
"dove"
Similar sound: These names share phonetic patterns with Irving — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Brythonic Celtic origins, giving them the same cultural heritage as Irving.
Rhythm: Irving is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.