J O Hambro will become Waverton Investment Management, in a reference to the Gloucestershire base of Richard Hambro, who died in 2009.
The rebrand follows the sale of the JOHIM business by Credit Suisse to Bermuda based financial services group Somers Limited and JOHIM management in 2013.
Some existing funds have used the Waverton banner since 2004.
The London based specialist investment manager has approximately £4.5 billion of assets under management.
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Hugh Grootenhuis, chief executive at Waverton, said: "Today's announcement represents a change in name only. The underlying structure of the business remains the same.
"Waverton is not a new name for us. Our existing funds, a number of which are award winning and highly rated, have used the Waverton banner since 2004 and are well known to our clients.
"While the name may therefore be new to some, the history and experience underpinning the business are extensive and we feel that the name Waverton not only gives us a clear identity going forward, but also acknowledges the original foundations and values on which the company has been built."
The company provides discretionary portfolio management for private clients, charities and institutions, also offers a range of offshore funds through its Dublin-based Waverton Fund range.