From Rigpa Wiki
Pema (Tib. པདྨ་ Wyl. pad ma), derived from the Sanskrit padma, means lotus. As it is a beautiful flower which grows out of mud, it symbolizes purity arising out of impurity and the transmutation of the destructive emotions into wisdom. As a name, it is also a reference to Padmasambhava, who, as his name suggests, was born from a lotus.