The Gesta Comitum Barcinonensium names (in order) "Radulfum, Guiffredum, Mironem et Suniarium" as the four sons of "Guiffredus Pilosus comes" & his wife, Miró succeeding his father in Barcelona.
He succeeded as Comte de Cerdanya, Conflent i Berga. It is unclear whether he succeeded his father in [897] or his paternal uncle after 18 Feb 899. A charter dated 18 Feb 899 confirms the possessions of "domna Hemmone habbatissa" in "comitatu Cerdaniensis in valle Petrariense in villa…Stegale", in the presence of "Mirone comite et judices Recosindo Bladino", the document specifying the exclusion of "ipsa hereditatem de Domna Windilde cometissa condam…in villa…Provenca…qui sunt de Recosindo". It is unclear whether "Mirone comite" in this document is the son of Guifré [I] or his uncle.
Comte de Besalú 913. A charter dated 16 May 914 records the allegiance of the inhabitants of San Juan, Ogasa, Surroca and Caballera del valle de Ripoll to the abbess of Ripoll Sant Joan, in the presence of "Mirone et Suniario comites et marchiones, Ermemiro et Unifredo vicecomites".
The testament of "Miro", dated 13 Jun "anno XXVIII regnante Karolo rege" (variously interpreted as 921 or 926, depending on how the reign of Charles III "le Simple" King of the West Franks is calculated), names "sorore mea Hemmoni abbatissa, seu Unifredo vicecomite fideli meo et consanguinea mea Gilesinda, et filio suo Remesario vicecomite fideli meo…sorore mea Ermesinda…filio meo Wischafredo…filia mea Guilindo…filia mea Chixilone…filia mea Goltregoto…filia mea Sesenanda" and "uxori mea Ava", also referring to (but not naming) "filios meos legitimos". The Chronicon alterum Rivipullense records the death in 928 of “Miro com. filius Wilfredi com.” The Gesta Comitum Barcinonensium records that "Miro comes" died in 929 and was buried "in ecclesia Rivipolli". 1
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