Simon Michał Giedroyć (1764 - 1844), Simono Mykolo Giedraičio, suffragan of Samogitia 1804-1838, coadjutor of the Diocese of Samogitia 1838, Ordinary Bishop of Samogitia; Knight of the Order of St Stanislaus.

Bishop, studied at the Varniai priests' seminary. Ordained a priest in 1787, he obtained a doctorate in theology at the Vilnius Academy. Degree, although he did not study at the academy. 1789 Lord. Member of the Lithuanian Tribunal, 1804 Petrapilis Spiritual College appointed bishop JA Giedraitisakoadiutor, Pope only in 1812. confirmed in the election of the Samogitian diocese. From 1808 to 1819 he represented the Samogitian diocese in the Petrapilis Spiritual College, from 1829 IV 1 he was president of this commission. After the suppression of the 1831 uprising, he took over the de facto government of the Samogitian diocese, leaving Bishop Joseph Arnulf in charge of representative functions, thus saving many priests from deportation and other punishments. After the death of Bishop JA Giedraitis, by a decision of the Samogitian chapter, he was appointed inspector general and administrator of the Samogitian diocese. He did not receive the Pope's approval as bishop. He died in 1844. VIII7 / 19 in Alsėdžiai, buried in the crypt of the bishop's cathedral in Varniai