"It is not clear who his parents were.[3] He was either the first born son of Lambert, margrave of Tuscany, or Lambert's brother Guy who was married to Marozia. He was the Count and Duke of Lucca, and at a later time Marquise of Tuscany from 915 to 929."
https://it.wikipedia.org/wiki/Adalberto_il_Margravio
"Ritenuto figlio probabilmente di Guido di Toscana[3], il conte e duca di Lucca che fu marchese di Toscana dal 915 al 929. Risulterebbe invece figlio di Lamberto[4]: il fratello successore di Guido."
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https://en.wikipedia.org/wiki/Adalberto_the_Margrave
Kind(eren):
Ook Adalberto III