[3] He was capped by Scotland in 1906 and was the only serving Port Glasgow Athletic player to have been selected for international duty.

[1][4][5] Hamilton's elder brothers Alexander and James were also Scotland international players.

[4] Historians have suggested that the success of his siblings may have been a factor in his selection, as his own club career was fairly unremarkable.

[6] A fourth brother, John, was an early international for Chile, after having moved there for work reasons.

[7][8] This biographical article related to association football in Scotland, about a forward born in the 1870s, is a stub.