Namesakes
Olympic Medalists:
2 gold, 1 bronze, 1 bronze/gold, 1 silver, 1 silver/bronze, 1 silver/gold
(silver/gold) Guo Jingjing 2000; 2004; 2008 diving - springboard; diving - synchronized springboard 
(silver) Guo Dan 2008 archery - team
(bronze) Guo Xinxin 2010 freestyle skiing
(gold) Guo Wenjun 2008; 2012 shooting
(silver/bronze) Guo Shuang 2008; 2012 cycling - track
(gold) Guo Weiyang 2012 artistic gymnastics
(bronze/gold) Guo Yue 2004; 2008; 2012 table tennis
Saints:
1 saint
Saint Alberico Crescitelli (a.k.a. Guo) 1863-1900