Surely the peony breeder is Casoretto born in Chiavari.

Perpenti's list of Casoretti's roses is different: Ayez, Palagi, conte Taverna, Pasta, Noisette inermis, microphylla Bordoni, e le rose “Thea” Traversi, Strambio, Gabrini, Pallavicini, Nankin e Compton. As you can see, it co-incides with Manetti's in some elements. The variety 'Palagi', one might guess, derives its name from the painter/architect Pelagio Pelagi with whom Casoretti later conducted an exchange of letters relating to the Gothic Tower in the garden of Villa Traversi. Probably it is this rose, though spelled 'Pallaggi', that is amply described in Annales de l'Institut de Fromont (1827, p.142) just above another Casoretti rose, Conte Taverna: "Pallaggi – Hybride de Bengale. A bush of medium vigour, green stems and armed with numerous irregular wild red thorns; small leaves composed of round leaflets, quite smooth with blunt notches, rather velvety and pale green below born on a hairy petiole; round ovary, bare; sepals simple, large; flowers 3 inches, semi-full, brightest, dazzling purple red, with large external petals, notched (jagged) at the top, less red outside than inside, interior petals smaller towards the centre and some right at the centre marked by a white line along the midrib. The disk is a greenish cone formed of fused foliaceous styles so that this rose cannot bear fruit naturally or pollinated artificially, but it has good stamens that can pollinate other flowers."
There are several other roses with not dissimilar names though not necessarily the same plant, so a fair amount of unravelling needs to be done. Certainly the Institut de Fromont seems to have marketed several Lombard rose. For example, the 1832 Annales lists, apart from 'Belle de Monza' (Rosier-Bengales), 'Comptoniana', 'Lord Byron', the teas 'Belle Traversi' and 'Pallaviccini' and 'Strombio', and the Rosier-hybrides 'Casorettiana', 'Comte Taverna' and 'Pellagi'.

Basic information on Casoretti:
He was born at Rovello in the Province of Como on 6 April 17971. He started as an apprentice gardener under Giuseppe Tagliabue in Conte Litta’s famous garden at Lainate in 1814 before moving to Milan in 1818 to work for Giuseppe Bellati. Here, apart from being responsible for Bellati’s garden, he ran a commercial nursery on his own account. In 1822 he was appointed Director of what by then was the Villa Traversi, following the firing after more than twenty years as head gardener of Antonio Villoresi. Giovanni Casoretti soon became renowned as a botanist and horticulturalist. At Desio, as in Milan, he ran the estate’s nursery, probably founded by Antonio Villoresi, breeding a wide range of plants and introducing new plants from abroad. Casoretti’s death, following a short illness, was announced to his employers by a letter sent by the estate’s factor on 8 November 1846. There followed a long legal dispute between Casoretti’s family members and Traversi, which ended many years later with the lawyer making them a derisory payment. Much of this is based on Pertusati, Francesco: Cenni biografici sopra Giovanni Casoretti in Il Giardiniere, Giornale d’orticoltura teorica e pratica per giardinieri, coltivatori di fiori, amatori di giardini d’ogni genere, Milano, 1852, p.211.
Two principle sources for his roses are Perpenti's description of the Villa Traversi garden in Descrizioni della citta' di Monza e sua Basilca, dell'I.R. Palazzo, Giardini e Parco e delle Ville piu' rinomate de' suoi dintorni and Manetti's contribution to The Gardener's Magazine 1836 p.448. A description of the garden in 1830 can be found in Francois-Philibert Fontaneilles: Du Jardin de M. Traversi, a Desio dans le Milanais, in Annales de la Société d’Horticulture de Paris, et Journal special de l’état e des progress du Jardinage, Tome Septième, Paris 1830, p.50. The first (and perhaps only) part of his account of camellia growing in that garden can be found in Bossi: Annali universali di agricoltura, industria ed arti economiche, Milano, sett-ott 1831, p.142.