When God promised them a son, Sarah laughed.
And so, she named her son Isaac, which means laughter. For Abraham and Sarah once again laughed, but in great happiness, when Isaac was born.
When the time came, Abraham sent his servant Eliezer to find a wife for Isaac. And Eliezer saw a young lady who offered him water for his camels, even before she drew water for herself.
He knew that this helpful and kind young lady, whose name was Rebecca, was the right bride for Isaac. And so, Isaac married Rebecca.