If XIRAM is a word, and I am usually against seeing a proper name as
a word,
of the root XRM, 'tall and massive, mighty', as in mount XERMON, then
the variants of
this name provide an interesting example to the alternate uses of the
personal pronoun
IY, as in היא HIY; U, as in הוא; and O, as in שלו $EL-O, 'his'.
The purpose of the inserted personal pronouns is to add the
declaration "he is", to XRM.