 Another interpretation is that historians confused Danutė of Lithuania, daughter of Kęstutis, with Elzbieta.As an alliance, the marriage was significant because passages to and from western Europe had to pass through Masovia; it can be seen as an attempt to revive Grand Duke Traidenis' and his daughter Gaudemunda's link with Masovia in the 1270s.The marriage's importance is attested by Elzbieta's dowry