Granny, a Actinia equina sea anemone, died at the age of 67 on August 4, 1887.

… on the 4th August last, while surrounded by several of its offspring, and despite all the watchful care of Mr Lindsay, “Granny” succumbed, being known to have lived sixty-seven years. Apparently for State reasons, its death is only now announced.
The Scotsman, obit 1887

Actinia equina
Part of Royal Mail’s 2007 Sea Life set
Designed by Andrew Ross

Granny was a star attraction at the Royal Botanic Garden Edinburgh for decades, with its offspring taking on the name for over 100 years. Thousands visited the gardens hoping to have a glimpse of Granny, and its children. 

Why ‘Granny’? Sea anemones are probably phasic hermaphrodites meaning individuals have gonads of both sexes, although the male phase may be short lived, although this remains unclear (Swinney 2007). Over about 20 years in Dalyell’s care, Granny produced about 334 young, many of which were deformed; then in the spring of 1857 Granny gave birth to 240 living young in one night, in August 1872 to 30 young and to another nine in December that year. She continued to reproduce each successive year until her death (Swinney, 2007). Hence the name ‘Granny’, and it stuck.
Granny and her visitors – a specimen with ‘cult following’ – Botanics Stories

Last year’s obituary was equally celebrated, but more for a messy end, than star quality Dutch politician Johan de Witt nasty death.