 In the early 19th century , a new Castle Lachlan was built for the chiefs of the clan , and it remains the seat of the clan to this day . The last of the male line chiefs of Clan Maclachlan was John Maclachlan who died in 1942 . He was succeeded by his daughter , the twenty @-@ fourth chief of the clan , Marjorie Maclachlan of Maclachlan . Under her the Clan Maclachlan Society was formed in 1979 , and on her death in 1996 , she was succeeded by her eldest son Euan John Maclachlan of Maclachlan , Chief of Clan Maclachlan , 25th of Maclachlan and Baron of Strathlachlan , who is a member of the Standing Council of Scottish Chiefs . 
