There are several answers, including: Samuel (who anointed him), Saul (who worried that David might threaten his monarchy), Goliath (whom David vanquished), Solomon (David's son and successor), Bath Sheva (Solomon's mother), and Avshalom (who rebelled against David).
David and Bathsheba
David Shuster has been recently linked to Kera Rennert who is a producer at CBS News.
Nico David's birth name is Nicolae David Hernandez.
David Was's birth name is Weiss, David.
David Carmichael's birth name is David Andreas Manfred Carmichael.
David Saxa's birth name is David Saxa.
David Benioff's birth name is David Friedman.
David Birkin's birth name is David Birkin.
David Rintoul's birth name is David Wilson.
David Petruschin's birth name is David Petruschin.
David Sipe's birth name is David Sipe.
David Slama's birth name is David Slma.