Yes, it said claudia phantomhive right?? http://www.mangago.zone/read-manga/kuroshitsuji/an/kuroshitsuji/103/pg-5/ she was the late mother of vincent phantomhive(which is the twins' father), and remember when Ciel escape that Campania Ship? After all the fights were over Ciel ended up holding Undertaker's amulet and it said 'Claudia Phantomhive' , and Ciel was actually a bit confused, why did the amulet has his grandmother's name http://www.mangago.zone/read-manga/kuroshitsuji/an/kuroshitsuji-chapter-65.html/29/
Also if u r still confused try read this http://kuroshitsuji.wikia.com/wiki/Cloudia_Phantomhive
http://www.mangago.zone/read-manga/kuroshitsuji/an/kuroshitsuji/103/pg-5/
Isnt the twins parents died at the same time??? Same day and yr??? How come in this page it says they didnt?? Is it translation error?? Or did Claudia did survive another yr?? Or d stands for another meaning??