It takes a special rugby player to be known only by their initials.
The Welsh produced some magnificent players in the 1960s and 70s, good enough to simply go by the initials JPR, JJ etc. And they went even further, having players recognised worldwide by their Christian names - "Gareth", "Gerald" et al.
Here in New Zealand we have SBW - Sonny Bill Williams - a great talent on the field and starting to build something of a legacy off it.
After Saturday night's All Blacks victory over the touring British and Irish Lions - as epic and intense a test match as you could wish for - Sonny Bill was among the ABs who stopped to have a chat with some of the thousands of travelling fans who have come around the world in the vain hope of toppling the rugby world champions.
But being SBW, he did not stop at posing for a selfie or signing an autograph - he took off his shorts and socks and handed them to a delighted British boy in the stand.