帕斯高 (Pàsīgāo) is a phonetic transliteration:
帕 'Pa-',
斯 '-s-',
高 '-coe/-co'. It can render English names like Pascoe (e.g. detective Peter Pascoe in Reginald Hill's Dalziel and Pascoe novels and the BBC show), as well as Spanish-derived 'Pascua' (Easter).
高 ('tall') is chosen for its sound only.