徐霞客
With ancestors from Jiangxi province, Xu Xiake was born in what is today Jiangyin (in Jiangsu province) as Xu Hongzu (), as the second son of Xu Yu'an (徐豫庵, 1545–1694) and Wang Ruren (王孺人, 1545–1625). It was often said his mother encouraged him to travel and this shaped Xu's predilections. His sobriquet is Zhenzhi (). "Xiake" was an alternate sobriquet () given to him by his friend Chen Jiru (陳繼儒, 1558–1639) and it means "one who is in the sunset clouds". His other friend, Huang Daozhou (黃道周, 1585–1646), also gave Xu an alternate sobriquet: "Xiayi" (), meaning "untrammelled in the sunset clouds."