If you're looking for an easy way to make a list of siblings, you can use the WBE Auto Bio as Gary said. This creates a new bio with lots of things, but it doesn't delete anything - the old bio is still there - so you can copy and paste anything from the generated bio that you want and paste it into your current bio and then remove the generated bio. I've just made an Auto Categories feature for the WBE, and I think it would be good to make other mini-features like siblings list in the future for those people who don't need a whole new bio but would like to add that section.