I'm really a novice when it comes to the films or actors of Charlie Chan. However, here's a gal, Susan M. Kelly, who wrote about him for the website, IMMORTAL EPHEMERA:
https://immortalephemera.com/5956/warner-oland/
NOTE (from the above link): Susan M. Kelly is a freelance writer who lives and works in Dunellen, New Jersey. Susan is a regular contributor to The Movie Profiles & Premiums Newsletter.
Maybe she can assist?
Also, here's a blog from a supposed distant relative of Oland at Go-To-Hellman.blogspot.com. He has a hotlink to what he says is "an ancestor chart of Warner Oland going back 5 generations." (I didn't check it though):
I'm really a novice when it comes to the films or actors of Charlie Chan. However, here's a gal, Susan M. Kelly, who wrote about him for the website, IMMORTAL EPHEMERA:
https://immortalephemera.com/5956/warner-oland/
NOTE (from the above link): Susan M. Kelly is a freelance writer who lives and works in Dunellen, New Jersey. Susan is a regular contributor to The Movie Profiles & Premiums Newsletter.
Maybe she can assist?
Also, here's a blog from a supposed distant relative of Oland at Go-To-Hellman.blogspot.com. He has a hotlink to what he says is "an ancestor chart of Warner Oland going back 5 generations." (I didn't check it though):