Hmm well, "ding" and "ring" are both onomatopoeia to describe the sound of a bell ringing. Think of how children playing might say "ding ding" or "ring a ling" when pushing a fire engine or answering the phone. In this case it serves two purposes as the title of this gallery. It imitates the sound of a bell ringing in celebration and it incorporates the word "ring" which it was hoped would imply a wedding ring, since these are photos of our wedding.
I think it's use as a popular expression was probably started by Frank Sinatra and his love song, Ring a Ding Ding:
Life is dull, it's nothing but one big lull, then presto you do a skull
And find that you're reeling, she sighs and you're feeling like a toy on a string
And your heart goes: "Ring-a-ding ding, ring-a-ding ding, ring-a-ding ding"
How could that funny face that seemed to be common place
Project you right in to space. without any warning
Don't know if its morning, night-time, winter or spring
What's the difference: Ring-a-ding ding, ring-a-ding ding, ring-a-ding ding
She takes (grabs) your hand - this captivating creature
And like its planned - you're in the phone book looking (hunting) for the nearest preacher
Life is swell, you're off to that small hotel, and somewhere a village bell
Will sound in the steeple, announcing to people, Love's the loveliest thing
And the bell goes: "Ring-a-ding ding, ring-a-ding ding, ring-a-ding ding"