Isolda's great uncle was the Seneschal and High Sheriff of Cornwall, Sir Stephen Haym, one of the founding canons of Glasney College.
On 19 May 1277 Henry's wardship was purchased by his uncle, William Bodrugan, later Provost of Glasney, and Archdeacon of Cornwall.
She was buried in Glasney College and her son Sir Otto paid for the Bodrugan Chantry to be built there in his parents' honour.
At his death he owned the manors of Bodrugan, Pendrym, Trethem, Tretheak, Treworrick, Tremodret, Trevellion, Tregrehan, Trethew and Lantyan Parva.
In 1305 John le Poer, baron of Doneyl in Waterford, and Sibyl's son by her first marriage, was found owing Henry £200.
In April he was given permission to go "beyond the seas" for one year with Robert Burnell, Bishop of Bath and Wells, Edmund Crouchback and others.
As there is no record of him serving in Wales, he was probably part of the 1294 expedition to Gascony with John of Brittany and William Latymer.
In September 1302 the king issued a pardon to Henry's retinue, his younger brothers Peter and John, Adam de Markwell (married to Henry's uncle's illegitimate daughter), Serlo Wyse and John le Fugheler for crimes they had committed "in consideration of their service in Gascony and Scotland".