► 名詞家系  [かけい]    
meaning:  family  rank: 3☆ 家系図 ⇨ A family tree
☆ 
彼は
昔の
貴族の家系だ ⇨ He is from a former aristocrat family  
(☛ Pedigree)More examples:- 由緒正しい家系 ⇨ A family with a distinguished history, pedigree
 - 天皇家の家系図 ⇨ The family tree of the royal family
 - 彼は元貴族の家系の出身だ ⇨ He is from a former aristocrat family