Nixon sits next to 4 phonetic neighbors — Dixon, Mason, and Jackson are the closest matches by sound. Most share Nixon's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of Nicholas, son of Nick"
"father figure, patriarch"
"home ruler"
"great forest, eagle valley"
"from the River Clyde"
"wise friend"
"promised land, heavenly realm"
"gift of God"
"crow, raven"
"from the roe deer land"
"valley, dell"
"of the angel, son of Angelo"
"God is gracious"
"acquired, possessed"
"triumphant, victorious"
"protector of mankind"
"God will uplift (from Jeremy/Jeremiah)"
"stony meadow"
"son of Jeffrey, son of God's peace"
"love and goodness"
"of, from (Dutch)"
Similar sound: These names share phonetic patterns with Nixon — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English origins, giving them the same cultural heritage as Nixon.
Rhythm: Nixon is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.