My friend called her collie Lucy after my mum, so when I got Daisy I thought about returning the favour and calling her Margaret after my friend's mum (for all of about 2 seconds!). I do still look at Daisy sometimes though and think 'you really do look like a Philip to me'
.
I've called my young tortoise Betty, (because when I collected her she did a huge stinky poo in the car and when I got her out I did a Frank Spencer - oooh, Betty's done a whoopsie - and it stuck (the name, not the poo)). But as you can't really tell the sex of a tortoise until it gets a bit older the male name I've got in reserve is Cecil.