You said:

 

The bible says a good name is better to be given than great riches
 
McCain - Means Son of Cain
 
Barack - means blessed of the Lord

 

This is what I found:

 

Since you used Bararcks first name & McCains last I looked up McCains first & Baracks chosen last name as well:

 

 

JOHN:

The boy's name John \jo-hn\ is pronounced jahn. It is of Hebrew origin, and its meaning is "the Lord is gracious". Biblical: the name of the longest-lived of the 12 apostles, who was especially loved by Christ. Also the name of John the Baptist, who baptized Christ in the Jordan river. Dozens of variant forms, given names and surnames, male and female, have been created in almost every language. For a few examples, Jan is a Dutch and Slavic form; Janos is Czech; Joao is Portuguese; and the Johan variants are German and Swiss. Possibly the most popular name in history; kings, popes, saints, heroes, villains, and men of every degree between have borne the name.

 

 

Let us remember that Baracks first name was Barry & he changed it proably because Barry only means Fairheaded one & this is what I found below:

 

BARRY & BARACK:

Barry is Also possibly from Bearach (Irish, Gaelic) "means spear; sharp, pointed"

 

The boy's name Barack \b(a)-ra-ck\ is pronounced ba-RAHK, BARE-ek. It is of Hebrew origin, and its meaning is "lightning". Biblical: a valiant warrior who cooperated with the prophetess Deborah to win victory in a battle against overwhelming odds. See also Barric. American President Barack Hussein Obama.

 

 

OBAMA:

The boy's name Obama \o-ba-ma\ is of African origin, has the meaning "crooked, somewhat bent". Made famous by American President Barack Obama. Obama was originally his grandfather's given name.

 

 

I guess he wanted to be looked at as a CROOKED WARRIOR instead of fairheaded....LOL....Hmmmmm...I also find it interesting about the Hebrew background of each name..:)