Here's a couple of interesting facts you might not have known:
BlackRock was founded as BlackStone Financial Management within the private equity firm Blackstone Group in 1988. Larry Fink, BlackRock's founder and CEO, had joined Blackstone that year as a partner. The firms split in 1992.
Blackstone's name was founder Steve Schwartzman's invention, and reflected the ethnic roots of the firm's two original partners - schwarz is German and Yiddish for black, and peter (Pete Peterson), Greek for stone.
Source - King of Capital by David Carey and John E. Morris