A daughter of Prince Albrecht of Prussia and unfortunate Princess Marianne of Netherlands.
Princess Alexandrine of Prussia ( 1 February 1842 - 26 March 1906), married in 1865 to Wilhelm Duke of Mecklenburg-Schwerin,2nd son of Grand Duke Paul Friedrich of Mecklenbourg-Schwerin. They had one daughter Charlotte (1868-1942), who married firstly Heinrich XVIII Prince Reuss zu Köstritz and secondly Robert Schmidt.
I read in one of the numerous books of Princess Radziwill that Duchess Alexandrine was unhappy in her marriage and quickly separated from her husband: she lived in Berlin with her daughter. Any additional info and pictures on Duchess and of course her daughter are welcomed ; ))
Interesting fact that this unremarkable Princess and Duchess tried to derail engagement of GD Vladimir Romanov and his future wife Duchess Marie of Mecklenbourg-Schwerin,niece of Alexandrine's husband.
"Adi" - her nickname in the family- when Vladimir meet Marie aka Miechen first time in Berlin in 1872 was very glad about their feelings to each other, but when Vladimir returned home,talked seriously to his parents about Duchess Marie and had their consent, a telegram arrived from Adi. She begged Vladimir to give up his plans of marrying Marie as her niece loved another man and couldn't be GD's wife...Poor heart-broken Vladimir rushed to Alexander II, who sent a message to Marie's father that their children's alliance was out of question.
After some time all the party learned by surprise that Adi sent that telegram by her own accord and the Mecklenbourg clan didn't know anything about that! Marie of course didn't know either and refusal of the Romanovs was a blow for her.
After that Emperor Wilhelm I gave Adi a piece of his mind (mildly speaking!) and the misunderstanding was over. Anyway only in 1874 Vladimir could engage his beloved Marie.
Obviously Adi had her own reasons to push her nose into the Romanovs affairs, they said she wanted marry Marie to some relative - Reuss (Marie's mother was a Reuss) or Rudolstadt (relative of Marie's stepmother) but Adi itself didn't explain her behavior and played it cool.