Percival Wilkinson was born in Hampstead, London, the son of William Martin Wilkinson, a solicitor of 44, Lincoln's Inn Fields, London and his wife, Elizabeth, who hailed from Derbyshire. Percival's uncle, his father's brother, was the Swedenborgian writer J. Garth Wilkinson.[2] The legal profession was deeply rooted in the Wilkinson family, with Percival's grandfather James John Wilkinson (died 1845), having been a writer on mercantile law and a judge of the County Palatine of Durham. Of Percival's two older brothers, Edward and William, the latter went into their father's firm and of Percival's two younger brothers, Charles and Hugh, the latter trained as a barrister at Lincoln's Inn. Percival himself was at school locally, and then by 1871 was an articled clerk to an attorney.
He married Constance Vallance Stratford Bell in 1878, and his son Cuthbert was
born in 1880.[3]
In 1881 Percival Wilkinson he was still a solicitor in London, but died sometime before 1891.[4]