Quotes:
"Rachel is seen throughout the first four seasons; after a year's absence, she made occasional appearances during the rest of the show's run."
"The character [Judy] was never popular with fans, and after her on-camera time was reduced steadily, she disappeared without any explanation late in the 1992-1993 season."
https://en.wikipedia.org/wiki/Family_Matters_%28TV_series%29#Judith_.22Judy.22_Winslow
JUDY: "Her role in the long-running sitcom is known for being written out of the show without explanation. Subsequent episodes have the Winslows acknowledging only two children."
"The role of Judy was gradually reduced to make more room for Steve Urkel. In terms of popularity, Urkel quickly eclipsed all others on the show, and eventually many of the earlier performers were written out of the series altogether. Foxworth's character Judy was only the first of several characters to vanish mysteriously from the series as Urkel took over the show."
RACHEL: "She played the role until 1993, when she was given her own show, Getting By. After Getting By was canceled, Hopkins returned to Family Matters as a semi-regular character until 1997."
WIKI -- See each actress
