Okay, here's my joke. My brother made it up, but oh well! xD
So there are three sisters. The first one goes up to their dad.
"Dad? Why's my name Daisy?" She asks.
"Because a daisy fell on your head when you were born." He answered.
The next one went up to their dad.
"Dad? Why's my name Rose?" She asks.
"Because a rose fell on your head when you were born." He replies.
And then the last one scrambles in, tripping and growling.
"SJHFLJDKFNLIUANKJDNLKSJNCIUENC!!!!!!!!" She screams.
"Shut up, Cinderblock!" Their dad shouts.