小 + surname is the standard friendly form of address for a younger person —
小王,
小李,
小朴. Here
朴 (Mandarin Piáo, in this Korean-surname reading) is the Korean surname Park (박), the third-most-common Korean family name. Note
朴 has a separate meaning 'simple, plain' read as pǔ — but as a Korean surname it is read piáo.