Royal sits next to 4 phonetic neighbors — Roy, Loyal, and Joel are the closest matches by sound. Most share Royal's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"kingly, of royal blood"
"one who lives near a riverbank"
"messenger of God"
"son of the king"
"long narrow hill"
"man of laurels, from Laurentum"
"divinely appointed, called by God"
"world-encircling waters"
"one who carries loads, carrier"
"battle cry"
"dark man's settlement, coal-black farm"
"home ruler"
"divine power (from Oswald)"
"mortal, earthly"
"battle strength"
"appointed by God"
"fair, white, bright"
"good fortune, luck"
"lives near reeds"
"shallow river crossing"
"river"
Similar sound: These names share phonetic patterns with Royal — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English origins, giving them the same cultural heritage as Royal.
Rhythm: Royal is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.