Story of why I chose some of the names:
Martha - Superman and Batman's mother. Her My Residence alter ego is May (for Spiderman's aunt). The MC is the superhero in this story, so it seemed fitting.
Emma - Not much story. Her Daz model is called Emma.
Erika - The real person she is based on is called Erica, and one of the conditions she asked for when I proposed to build an alter ego for her was to change the C for a K. Her My Residence alter ego is Lagertha, another Nordic name.
Norah - I liked the name (and the character) in another game (without the final H).
Daphne - Her My Residence name is Laura (derived from laurel, the spice, that's what Daphne means in Greek).
Scarlett - Same as Emma. Did I mention I am bad at inventing names?
Eileen - Come on Eileen! (The double entendre is big, there.)
Simone - When I was designing her, I thought of Nina Simone. That's why her My Residence alter ego is called Nina.
Alexia - I wanted a Spanish name (or a name used in Spanish-speaking countries). When I was visiting a friend and he started talking with his Alexa, the joke about the name the MC uses in the hospital when he first met her came to mind. Alejandra, her My Residence alter ego, is the "real Spanish" version.
Amanda and Eva - I wanted names starting with A and E for the clones/originals (B, C, D, and F are dead). Eva was a clear choice as an original being "the origin" of Daphne and Erika in the unpatched version. Amanda was going to be called Ana (in the unpatched version, the MC's mother is called Anna, so naming the first girl the company adopts after herself was fitting), but I thought it could lead to some confusion. I was looking for a new name when one of my first patrons, the first on the highest tier, asked for one of the girls, even if it was a one-off character, to be called Amanda, be blonde, have clear eyes, and have green as her main color.
Lisa - Her My Residence alter ego is called Karen, for obvious reasons.
Betty - Her My Residence alter ego is called Vilma. The Flintstones.
Surnames:
Pitt (Olivia's surname and Norah's maiden name), Cavendish (Betty's surname and Olivia maiden name), Peel (Megan), Lamb (Eileen), Russel (Scarlett), Wellesley (Kiara's maiden name), Grenville (Martha's maiden name in the unpatched version), Perceval (Zoe), Robinson (Charlotte), and Jenkinson (Hailey) are British Prime Ministers' surnames.
Washington (Sam, Simone, and Jamaal) and Lincoln (Sam's maiden name) are POTUS surnames linked to places in England.
Gilford (Eva and Amanda) is a surname derived from GILF. I couldn't find any surname derived from NTR, so...