He's going to be around for quite a while and hey - it's not that hard!
Haumole is shorter than guacamole. So how is that hard?
If you prefer to use family name - then guacamole has the same number of letters as Olakau'atu!
I learned the pronunciation (well this seems to be a rough approximation anyhow) by thinking 'Ola -cow - R2' (apologies if he's reading this)
Whatever. But I expect Islander people appreciate efforts to pay respect to their culture by knowing their actual names, even if we'll often just go with a nickname