When we are in a situation that require us to introduce someone, we should always say their name first and their relationship to us after.
Common 'mistake': "This is my brother, John Doe ."
Do it right!: "This is John Doe, my brother."
That way, you spotlight the person--not their connection to you. This small thing makes a cute and notable difference!
I am going to start doing this now!
ps: More etiquette to follow: here. Chivalry should not be vanishing!