William (Leonard's Nephew)

William (Leonard's Nephew)
General Information
Name	William
Born	Unknown
Gender	Male
Nationality	American
Origin	Unknown
Relationships
Family	Unnamed father Unnamed mother Neil (brother) Scott (brother) Jeffrey (brother) Richard (brother) Alfred Hofstadter (maternal grandfather) Beverly Hofstadter (maternal grandmother) Leonard Hofstadter (maternal uncle) Michael Hofstadter (maternal uncle) Penny (aunt by marriage) Unnamed maternal aunt by marriage Unnamed maternal cousins
Production
First episode	"The Procreation Calculation" (first mentioned)
Seasons	S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12

William is the son of Leonard's unnamed sister.