Surname Siphon (Sipho 
, Sifon 
, ศรีพร 
) , globally, is quite a rare family name. The cognomen Siphon is habitual in Sub-Saharan Africa, particularly Eswatini, where it is quite a common surname, Lesotho, where it is quite a rare surname, and Botswana. Measured by absolute frequency, it is the most numerous in Nigeria, South Africa, and Argentina. More prevalently, Siphon is the forename as well as the last name.