He's wrong about Abigail. My sister is an 80s Abigail and it was quite rare then. Now it's really popular (well inside top 100, maybe top 50). I love it and Abbie is a cute nn, though nowhere near as nice as Abigail.
Adelaide (Della), Aurora (Laura??), Alexis (Lexi), Bethany (Beth), Cecily (Cece), Camilla (Milla), Cressida (Cressie??), Danielle (Ella), Dorothy (Dolly), Emmeline (Emmie), Eleanor (Lena), Francesca (Kessa), Fenella (Nella), Gabrielle (Ella), Georgina (Gina), Harriet (Hattie), Isabelle (Bella), Imogen (Immy??), Jessica (Jessie), Josephine (Josie), Katherine (Katie), Lillian (Lily), Lydia (Lyddie), Lorelai (Lora), Madeleine (Maddie), Miranda (Mimi), Matilda (Tilly), Natasha (Tasha), Natalie (Talia), Ottilie (Tilly), Philippa (Pippa), Rebecca (Rivkah), Rhiannon (Anna?), Rosemary (Rosie), Savannah (Vannah), Saskia (Kia?), Selena (Lena), Sylvia (Sylvie), Tallulah (Tallie), Vanessa (Nessa).