Family name Lyday (Lyday 
) , across the world, is quite a rare cognomen. The last name Lyday is habitual in the United States, where it is a rare surname, Israel, and Canada, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in the United States, Nigeria, and Canada. Very seldom, Lyday is the forename as well as the last name.
| terrell lyday American basketball player, US (b. 1979) |
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| amber marie lyday (born 1980) (b. 1980) |
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