Bertha (Rosenthal) Kahn, 98, of New Haven, has died. She was he wife of Justin Kahn. Born in Beefeldern, Hesse, German, she was the daughter of Irma Hamburger and Willy Rosenthal. She and her family fled Germany in the days leading up to the Holocaust. She is survived by her children, Harriet Fast and her husband Jack, and Michael Kahn, and Doris Kahn-Preston; her grandchildren, Katharine Fast, Betsy Fast, Jessica Preston and Joshua Preston. and seven great-grandchildren: Bill, Rose and Pete Smith; Lucas and Jonathan Truncone; Clara Preston, and Lucie Fast-Lehembre.