I have finded only 4 or 5 answerers of that exercice and I have finded out some imformation:
1. ...has the most cousins: Manuel catala 20
2. ...has the oldest relative:
3. ...has the youngest family member. 2 years, my niece.
4. ...has the most children. Alvaro: 2
5. ...has the most brothers and sisters. I have 5
6. ...has a relative in a foreign country.