I don't know if anyone mentioned this already here, but Lachlan is used as a surname too... singer Sarah McLachlan is a bearer.
― Anonymous User 7/22/2011
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Lachlan "Lockie" Leonard is a fictional character in a series of children's books by acclaimed West Australian author, Tim Winton. Lockie is a teenage surf rat who moves from the city to a remote coastal town and has to survive high school and the usual pubescent problems."Lockie Leonard" has been made into a stage play and a TV series which was filmed in Albany, Western Australia.
Lachlan Macquarie was Governor of New South Wales, Australia, from 1810 to 1821. He played a leading and historically memorable role in the colony's development.
Lachlan Murdoch is the son of Australian media mogul Rupert Murdoch, and married to Australian model/actress Sarah Murdoch (nee O'Hare). Lachlan is an extremely popular name in Australia, ranking within the top 5 baby names in every year for the last decade. Outside of Australia it is not nearly as common.Personally, while I like the spelling, yet familiar sound (reminds me of Lincoln), I don't particularly like the meaning of this on a child; unless, of course, he is from Norway, or at least somewhat Scottish.
In a Danish book by Lene Kaberbool, Lachlan is a family-name (the book's name is Skämmerskans Dotter, Skämmerskans = Someone who make you remember your worst mistakes, and dotter =daughter).