Watch out for aliases
If your ancestor was a performer, The
Stage and The Era, available at the British Newspaper Archive and Findmypast, may reveal that they used an alias – like Who
Do You Think You Are? star Lee Mack, who was born Lee Gordon McKillop. Criminal aliases may be discovered through court reports, while ancestors in business may have been known by a different name by their peers.
You may also find announcements of legal name changes on the free site thegazette.co.uk or The Times (available for free from libraries, or for a fee from newspapers.com).
The actor Julie Andrews had her name changed by Deed Poll by her mother in 1947 (see Gazette entry below)