yìn
descendant
八 represents the split between the bloodline relations. 幺 represents continuation. ⺼ represents the bloodline. All of these components convey the meaning "descendant".
Components
Evolution

Bronze script
Late Western Zhou (~800 BC)
Seal script
Shuowen (~100 AD)Regular script
ModernDefinitions
Most common words with 胤
Freq. | Word | Meaning |
---|---|---|
heir | ||
Zhao Kuangyin, personal name of founding Song emperor Song Taizu 宋太祖 (927-976) |
Sources
季旭昇《說文新證》p.343