Jacob sits next to 3 phonetic neighbors — Jake, Jacques, and Jacoby are the closest matches by sound. Most share Jacob's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Supplanter; one who follows at the heel"
"gift of Yahweh"
"God strengthens, strength of God"
"glory bright"
"father of peace"
"son of the sea, great tide"
"descendant of Rían (little king)"
"independent thinker, non-conformist"
"teacher, messenger"
"fiery, warm"
"Christian (the religion)"
"little warrior"
"the Lord saves"
"who is like God?"
"God will increase, he will add"
"of uncertain origin, possibly barberry hill"
"protector of men"
"light, bringer of light"
"revered, worthy of respect"
"from the western farmstead"
Similar sound: These names share phonetic patterns with Jacob — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Jacob.
Rhythm: Jacob is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.