The emoji 👨👧👦 represents family with a father, with two kids a boy and a girl. These three are displayed as single emoji on supported platform.
Note: In 2016 family: Man, Girl, Boy Emoji was added to Emoji 4.0.
👨👧👦 Family with Father, Son and Daughter
:man-girl-boy: (Slack)copy & paste emojiemoji meaningfamily man girl boy