The Este family, having owned land throughout north and central Italy from the 10th century, established their residence at Este in the Padovano in the second half of the 12th century. The family took over the interests of the Adelardi in Ferrara on the extinction of the latter. They acquired Modena and Reggio in Emilia. By 1500, its lands in Este itself had been surrendered to Venice[301]. The primary sources which confirm the parentage and marriages of this family have not yet been identified, unless otherwise stated below.
ADALBERTO [I] . Marchese in the March of Milano. m ---. The name of Adalberto's wife is not known. Adalberto & his wife had one child