LadySarahB's list "Rough and Tumble Boys' Names" of 4 great name ideas: Brandt - Ransom!

Rough and Tumble Boys' Names

Names for boys who like to play in the dirt and break things.

Brandt

Flint is one of the new macho names on the rise today, part old-school tough guy, part rebel. You won't find a tougher, steelier-sounding name; it's part of a genre on the rise along with cousins Slate, Stone and Steel. 
 Flint found itself on the popularity list for a few years in 1959-60, but would prove a distinctive choice today.
 Flint has superhero overtones--there's one in "Spiderman"--aka Sandman--and Captain Flint was a Marvel comic, and Flint is both a legendary pirate and a parrot in Robert Louis Stevenson's Treasure Island. But on the softer side, there's also inventor Flint Lockwood in Cloudy With a Chance of Meatballs.

Flint

Has a sharp investigative quality that's not a bad thing to impart to a child. 

Keane

Ransom may be rakish and handsome, but it carries an unavoidable association with holding someone for ransom. But that kind of bad boy image might be exactly what attracts you to Ransom in the first place. 

While Ransom feels like a modern appellation ala Breaker or Ranger, it's interesting to note on the popularity chart that it was actually quite popular at the end of the 19th century but fell off the Top 1000 around 1930.