Jamaican Rum JMH Thompson Bros and Bar Tre. You might be forgiven for thinking I have already reviewed this. I haven’t the rum I reviewed very recently with a very similar title was JMM rather than JMH. The JMM and JMH I am now assuming to mean JaMaica Monymusk and JaMaica Hampden. As this particular single cask bottling hails from the Hampden Estate, Trelawny, Jamaica.