Surname Hallatt (Hallatt 
) , across the world, is a rare cognomen. The last name Hallatt is characteristic of the United Kingdom, where it is a rare surname, Ireland, and South Africa. Measured by absolute frequency, it is the most numerous in the United Kingdom, South Africa, and the United States.
| VARIANT | COUNTRY |
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| Hallatt | United Kingdom, Mexico, United States, South Africa, Canada |
| may hallatt British actress (1876-1969), GB (b. 1876) |
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| david hallatt Bishop of Shrewsbury; Archdeacon of Halifax (b. 1937) |
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| alex hallatt Australian cartoonist, AU (b. 1969) |
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| josh hallatt college basketball player (1994–1998) Indiana State; Austin Peay |
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