Main character:
Names from 1940's, old fashioned and simple.
James
Henry
Robert
John
David
Evan
Randall
Joseph
Thomas
Kenneth
Neil
Charles
Michael
Warren
Stephen
Jack
Arthur
William
Jacob
Andrew
Louis
Leonard
Samuel
Russell
Melvin
Theodore
Harvey
Calvin
Matthew
Benjamin
Christopher
Nicholas
Edward
Carl
Peter
Hugh
Oliver
Julian
Ruben
Love interest:
From 21st Century, but name is feminine and old fashioned
Julia
Anna
Hilary
Camille
Sophia
Clarissa
Beth
Melinda
Ivy
Mara
Renee
Bridget
Katherine
Rosalie
Caroline
Juliet
Vivienne
Sarah
Eliza
Francesca
Iris
Maggie
Claire
Diana
Evelyn
Nora
Adeline
Sylvia
Phoebe
Alice
Isabel
Grace
Elisabeth
Audrey
Lillian
Jane
Celeste
Madeleine
Lucy
Georgia
Eva
Charlotte
Josephine
Eleanor
Meredith
Juliana
Clara
Elise
Lydia
Sophie
Emma
Beatrice
Violet
Stella
Lois
Emily
Addie
Celia
Teresa
Simone
Edie
Amelia
Grandson:
Somewhat modern and honors grandfather
Jameson/Jamie/Ames (James)
Harris/Harry (Henry)
Robin (Robert)
Jonah/Jonas/Jonathan (John)
Davey/Davis (David)
Everett (Evan)
Rand (Randall)
Josiah/Seth (Joseph)
Kent/Keats (Kenneth)
Daniel (Neil)
Charlie/Chase (Charles)
Micah/Mitchell (Michael)
Finn (Stephen)
Jackson (Jack)
Archer (Arthur)
Liam/Willis/Wilson (William)
Jack/Jake/Coby (Jacob)
Drew/Anderson (Andrew)
Lewis/Luke (Louis)
Leo/Leon (Leonard)
Samson/Saul (Samuel)
Vincent (Melvin)
Theo/Teddy (Theodore)
Harry (Harvey)
Callum/Vin(cent) (Calvin)
Bennett/Benson/Jamie (Benjamin)
Topher/Christian (Christopher)
Cole/Nixon (Nicholas)
Xander/Alex/Andre (Alexander)
Ward/Edison (Edward)
Carlton/Carlisle (Carl)
Ollie/Olson (Oliver)
Jude (Julian)
Ben(jamin) (Ruben)
Isaiah/Zach(ary) (Isaac)
Surnames:
Mayfield
Hart
O'Connell
Seymour
Daugherty
Crow
Sinclair
Hutchens
McAllister
Downing
Lockhart
Roe
Clement
Garner
DuBois
Eames
Davenport
Ellery
Booth
Truman
Dickinson
Garland
Woods
Colbert
Donnelly
Swartz
Murdoch
Abrams
Fraser
Goodwin
Aldridge
Doyle
Doherty
Hathaway
Rosenberg
Sumner
Haywood
Brown
Hager
Pritchett
Drummond
Calloway
Reed
Kauffman
Atwood
Whittaker
Swan
Thayer
McNally
Adair
Gifford