(died 1233) was the Judge of Logudoro
from 1218 until his
death. He was an ally of the Republic
and enemy of Pisa
He was a son of Comita III
his wife Ispella of Arborea), who associated him with the
government of Logudoro as early as 1203. He succeeded his father in
1218. Mariane was half-brother of Hugh
I of Arborea
Of his sisters, Maria was in 1202 married to the heir of the
Marquess of Saluzzo
, and Iurgia
(Giorgia) in 1210 to Emanuele Doria
heir of the Genovese fortress
Around 1200, Comita III came to terms with William I of Cagliari
and Ubaldo I Visconti
, promising to marry his
son Marianus to William's daughter Agnes.
By a pact signed November 1218 with Lambert of Gallura
, Marianus secured the
marriage of his daughter Adelasia
to Lambert's son Ubaldo
marriage was celebrated in 1219. Pope
, enemy of the Pisans, immediately sent his
chaplain Bartolomeo to annul
the marriage, but
he failed and the pact between Pisa and Logudoro stood.
nevertheless urged Milan to aid
Marianus in any opposition to Pisa.
In 1228, Peter II of Arborea
allied with the Visconti
. He was consequently
attacked by Marianus in concert with William II of Cagliari
. They desired
to maintain a condominium in Arborea, but internal fighting allowed
Peter to solidify his authority with little opposition.
to 1232, Marianus exercised the regency of Cagliari on behalf of
the young William II and in right of his wife Agnes.
in 1233 and, by his will, was succeeded by his son Barison III
. Upon Barison's death
(1236) without heirs, the Logudorese magnates, as specified by
Marianus' will, elected one of his daughters Adelasia or Benedetta (who is thought to
have married the catalan Count of Empuries) to
They unanimously acclaimed Adelasia, whose husband
could well uphold her right. So they in turn elected him judge as
- Ghisalberti, Alberto M. Dizionario Biografico degli
Italiani: VIII Bellucci – Beregan. Rome, 1966.
- Caravale, Mario (ed). Dizionario Biografico degli Italiani:
Guglielmo Gonzaga – Jacobini. Rome, 2000.
- Nowé, Laura Sannia. Dai "lumi" dalla patria Italiana:
Cultura letteraria sarda. Mucchi Editore: Modena, 1996.