Matchmaker

• A person who engages in matchmaking, sometimes as a profession

In theatre, film, and television:

• The Matchmaker, a play by Thornton Wilder
• The Matchmaker (film), a 1958 film starring Shirley Booth
• Matchmaker (game show), a late-80's dating show
• "The Matchmaker" (Frasier), a 1994 episode of the situation comedy Frasier
• The MatchMaker (1997 film), a 1997 film starring Janeane Garofalo
• "Matchmaker" (How I Met Your Mother), a 2005 episode of the situation comedy How I Met Your Mother

In computers:

• Matchmaker.com, an internet dating service