I don't know if anyone is bored on a Friday and fancies a challenge, but I have been trying to research the person above.
In the Navy Dictionary it says;
"ISAAC HAWKINS MORRISON, Esq. [Post-Captain of 1814.] Entered the navy under the patronage of the late Isaac Hawkins Browne" ... Clearly from the names there must have been a link between the families, and IHM must have been named after IHB (or probably his father of the same name). There is no evidence the Morrison family were well off and I can't find any links - so any suggestions or help on how these families were related is what I'm looking for!