Rather than stretching the theme with #5, which could likely lead to an extensive list by itself, here are a couple more possibilites.

Vanessa Redgrave - Joely Richardson - Natasha Richardson
Natalie Wood - Natasha Gregson Wagner
Judy Loe - Kate Beckinsale
Raquel Welch - Tahnee Welch

A couple more that probably don't qualify but for conversation..

Bebe Buell (not on film though) - Liv Tyler
Colleen Farrington (not on film though) - Diane Lane
Jerry Hall - Elizabeth Jagger
Bianca Jagger - Jade Jagger
Cheryl Ladd - Jordan Ladd

Lisa Bonet !!!!???????? Come on , she's a scank

How about Mia Farrow & her mother, Margaret O'Sullivan. In Tarzan, Jane dives from a tree branch to the water below, but Tarzan is standing on her dress. Jane hits the water, without the dress. There is an extended scene of Jane swimming underwater in the buff. This scene surely contributed to the Hayes Code.
Mia Farrow was nude in RoseMary's Baby. Don't know if any of Mia's daughters are actresses. Then you could have 3 generations.

How about Melanie Griffith and her mother, Tippi Hedren?