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"
"bright, clear, famous"
"selected, chosen one"
"people's champion, victorious one"
"universal, whole"
"gift of God"
"rock worker, craftsman"
"steps over a fence or wall"
"invented modern American name"
"Roman fort on the River Leir"
"court musician, entertainer"
"fair-haired, blonde head"
"mountain, mountainous region"
"peace of the father"
"God is my father"
"son of Gilbert, son of Gib"
"valley of the hares"
"the greatest"
"from the bailey (castle wall)"
"devotee of Saint Columba"
"leader, sovereign"
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.