Yes, Lois Lowry had two siblings. She had a sister and a brother.
Apparently, L.S Lowry did have a sister, named Louis, however, some sources claim he did not have siblings and others say he had three sisters.
L.S Lowry stands for Laurence Stephen Lowry.
Rich Lowry's birth name is Richard A. Lowry.
The Lowry was created in 2000.
Arnolda Lowry's birth name is Arnolda Elinor Lowry.
Ludwig Lowry's birth name is Louis Ludwig Lowry.
Lynn Lowry's birth name is Linda Kay Lowry.
Richard Lowry's birth name is Jon Rico Lowry.
Scooter Lowry's birth name is Elmer C. Lowry.
Kailyn Lowry's birth name is Kailyn Rae Lowry.
Shanti Lowry's birth name is Shanti Misha Lowry.
LS Lowry's full name was Laurence Stephen Lowry.