Option 1:

• Older Brother: Rex (Latin, "king," implying strength and leadership) / Younger Brother: Shade (English, "shadow," suggesting secrecy and mystery)

• Older Brother: Hawk (English, "hawk," symbolizing keen observation and stealth) / Younger Brother: Ghost (English, "ghost," representing unseen presence and intrigue)

• Older Brother: Cipher (English, "code," hinting at their undercover work) / Younger Brother: Nix (English, "nothing," implying their ability to blend in unnoticed)

Option 2: (Slightly longer names)

• Older Brother: Silas (Latin, "forest," suggesting a grounded and watchful nature) / Younger Brother: Ryker (German, "rich ruler," implying ambition and cunning)

• Older Brother: Jasper (Persian, "bringer of treasure," suggesting valuable skills and knowledge) / Younger Brother: Ren (Japanese, "lotus," symbolizing purity and hidden strength)

• Older Brother: Damon (Greek, "to tame," suggesting control and composure) / Younger Brother: Lysander (Greek, "liberator," implying a rebellious and resourceful nature)

Option 3: (More modern feel)

• Older Brother: Ace (English, "one," implying top-tier skills) / Younger Brother: Wraith (English, "ghostly apparition," suggesting their elusive nature)

• Older Brother: Knox (Scottish, "hill," suggesting stability and strength) / Younger Brother: Zero (English, "nothing," representing their ability to disappear)

• Older Brother: Cole (Irish, "dark-haired boy," suggesting a mysterious and handsome appearance) / Younger Brother: Reeve (English, "reeve," suggesting authority and control, but subtly)