Only ones I can think of are Lee Sharpe when Sharp sponsored Man Yoo and Ian Walker when Walker's sponsored Leicester.
However...
Walker arrived at Leicester in the summer of 2001, the same summer that the Foxes abandoned Walker's crisps as a sponsor and replaced it with LG Electronics, so he never actually wore a shirt with his name on both sides in the Premiership.
Lee Sharpe, meanwhile, and being pedantic, the spellings are different, thus ruling him out too.
The one case could be former Middlesbrough striker Hamilton Ricard, who had been playing for Danubio in Uruguay. Danubio are sponsored by Ricard - a brand of chocolates - and although player names are not printed on shirts in Uruguay, the sponsor's logo is blazoned across both the chest and back of Danubio's strip, meaning that Ricard's name is, indeed, on both sides of his shirt.
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Talal El Llanera at Charlton
However...
Walker arrived at Leicester in the summer of 2001, the same summer that the Foxes abandoned Walker's crisps as a sponsor and replaced it with LG Electronics, so he never actually wore a shirt with his name on both sides in the Premiership.
Lee Sharpe, meanwhile, and being pedantic, the spellings are different, thus ruling him out too.
The one case could be former Middlesbrough striker Hamilton Ricard, who had been playing for Danubio in Uruguay. Danubio are sponsored by Ricard - a brand of chocolates - and although player names are not printed on shirts in Uruguay, the sponsor's logo is blazoned across both the chest and back of Danubio's strip, meaning that Ricard's name is, indeed, on both sides of his shirt.
Unless there are any others?