I recently did cast and crew audits on:

Hold That Ghost
Keep 'Em Flying
The Secret Bride

All are William Davidson.

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Each Dawn I Die: William Davidson (as Bill Mason)
Marked Woman: William B. Davidson (as Crandall)
In This Our Life: William B. Davidson (as Jim Purdy)

They Made Me a Criminal (1939) William Davidson as Ennis

In Old Oklahoma a.k.a. War of the Wildcats (1943) not credited
Scarface (1932) not credited

Hook Line and Sinker (1930): William Davidson (http://www.archive.org/details/hook_line_and_sinker)

A couple more...

The Bachelor and the Bobby-Soxer - Not Credited
The Male Animal - William B. Davidson

---------------

Fog Over Frisco, William Davidson
Hollywood Hotel, William Davidson
I'm No Angel, Wm. B. Davidson
Lillian Russell, William Davidson
Week-End in Havana, William Davidson

Go Into Your Dance (1935): William Davidson - Not Credited 
Feature has no credits therefore IMDb-mined data is wrongly added in profile and approved.  http://www.invelos.com/Forums.aspx?task=viewtopic&topicID=393056&PageNum=LAST
Man Made Monster (1941) Not Credited
http://www.youtube.com/watch?v=HB81HSHRauo
Something to Sing About (1937): William Davidson
http://www.youtube.com/watch?v=K3GEQnc8S0s    (@1.26.33)
Sun Valley Serenade (1941): William Davidson
http://www.youtube.com/watch?v=3ucP6y8p17w  (@1.22.21)
The Singing Kid (1936): Wm. Davidson
http://www.youtube.com/watch?v=z8QIyStuBo8  (@0.20)

Affairs of Cappy Ricks (1937): William B. Davidson
http://www.youtube.com/watch?v=y095ctDfzZA  (@0.42)
The Affairs of Jimmy Valentine a.k.a. Unforgotten Crime (1942): William B. Davidson
http://www.youtube.com/watch?v=e_akkHOFOLs  (@ 0.12)
Blockade (1938): Wm. B. Davidson
http://www.youtube.com/watch?v=6SCD-9eLSyQ  (@1.20.04)
Dick Tracy's Dilemma (1947):  William B. Davidson
http://www.youtube.com/watch?v=Jn_l-Ja0cWg  (@0.23)

Missing titles found in CLT (4)
The Silver Horde (1930):  William Davidson 
http://www.youtube.com/watch?v=hEluvMpIvME  (@0.45)
Juke Girl (1942): William B. Davidson  - Not Credited
http://www.youtube.com/watch?v=TEXZHUI970g (openingcredits)
The Hurricane (1937): William B. Davidson - Not Credited
http://www.youtube.com/watch?v=--Ae4hkskjU
Mystery of the Wax Museum (1933): William B. Davidson - Not Credited
http://www.youtube.com/watch?v=Yfjyzk9J1Ms

Missing titles found in CLT approved in profiles (8)  
My Love Came Back (1940): William Davidson
Names cast approved in profile 883316-287996. http://www.invelos.com/Forums.aspx?task=viewtopic&topicID=576124&PageNum=LAST

My Wild Rose (1947): William Davidson
Names cast approved in profile 883316-236567. http://www.invelos.com/Forums.aspx?task=viewtopic&topicID=576124&PageNum=LAST

Dangerous (1935): William Davidson
Names cast and crew approved in profile 883316-382318.
http://www.invelos.com/Forums.aspx?task=viewtopic&topicID=591177&PageNum=LAST

In Society (1944): William B. Davidson -
Names Cast and Crew approved in Profile (USA) with disc ID IFCA0284BF2181776. http://www.invelos.com/Forums.aspx?task=viewtopic&topicID=319368&PageNum=LAST

The Great Mans Lady (1937): William B. Davidson
Names Cast and Crew approved in Profile (USA) with disc ID IB2386BE7C46CE865.
http://www.invelos.com/Forums.aspx?task=viewtopic&topicID=449913&PageNum=LAST

The Dragon Murder Case (1934): William Davidson
Names Cast and Crew approved in Profile (USA) with disc ID I9AFE7D4F026BC52C.
http://www.invelos.com/Forums.aspx?task=viewtopic&topicID=694474&PageNum=LAST

It Happened in Hollywood (1937) :  William B. Davidson
Names Cast and Crew approved in Profile (USA) with disc ID I38C2353338F40226.
http://www.invelos.com/Forums.aspx?task=viewtopic&topicID=407201&PageNum=LAST

Smashing the Money Ring (1939): William Davidson
Names Cast and Crew approved in Profile (USA) with disc ID I07E7D197C8322E9A.
http://www.invelos.com/Forums.aspx?task=viewtopic&topicID=575627&PageNum=LAST


Summary
William Davidson: 20 Titles - 2 uncredited - 18 Confirmed
Bordertown (1935) *confirmed by Corne
Each Dawn I Die (1939) *confirmed by Merrik
Fog Over Frisco (1934) *confirmed by m.cellophane
Go Into Your Dance (1935) * confirmed by JOHNNYV (uncredited)
Hold That Ghost (1941) *confirmed by scotthm
Hollywood Hotel (1937) *confirmed by m.cellophane
Hook Line and Sinker (1930) *confirmed by Corne
Keep 'Em Flying (1941) *confirmed by scotthm
Lady Killer (1933) *confirmed by scotthm
Lillian Russell (1940) *confirmed by m.cellophane
Man Made Monster (1941) *confirmed by JOHNNYV (uncredited)
The Most Dangerous Game (1932) *confirmed by hallo-marvin
The Secret Bride (1934) *confirmed by scotthm
Seven Sinners (1940) *confirmed by scotthm
The Silver Horde (1930) *confirmed by JOHNNYV
Something to Sing About (1937) *confirmed by JOHNNYV
Sun Valley Serenade (1941) *confirmed by JOHNNYV
They Made Me a Criminal (1939) *confirmed by Corne
Week-End in Havana (1941) *confirmed by m.cellophane
Windy Riley Goes Hollywood (1931) *confirmed by Draxen

Wm. B. Davidson: 2 Titles - 2 Confirmed
I'm No Angel (1933) *confirmed by m.cellophane
Blockade (1938) *confirmed by JOHNNYV

Wm B. Davidson: 0 Titles - 0 Confirmed
I'm No Angel (1933) *confirmed by m.cellophane

Wm. Davidson: 2 Titles - 2 Confirmed
Gold Diggers of 1937 (1936) *confirmed by scotthm
The Singing Kid (1936) *confirmed by JOHNNYV

William B. Davidson: 13 Titles -3 uncredited - 10 confirmed
Affairs of Cappy Ricks (1937) *confirmed by JOHNNYV
The Affairs of Jimmy Valentine a.k.a. Unforgotten Crime (1942) *confirmed by JOHNNYV
Dick Tracy's Dilemma (1947) *confirmed by JOHNNYV
Easy Living (1937) *confirmed by scotthm
Hell's Angels (1930) *confirmed by Draxen
The Hurrycane (1937) *confirmed by JOHNNYV (uncredited)
In Society (1944) *confirmed by scotthm
In This Our Life (1942) *confirmed by Merrik
Juke Girl (1942) *confirmed by JOHNNYV (uncredited)
Larceny, Inc. (1942) *confirmed by scotthm
The Male Animal (1942) *confirmed by scotthm
Marked Woman (1937) *confirmed by Merrik
Mystery of the Wax Museum (1933) *confirmed by JOHNNYV (uncredited)

Unconfirmed titles
Meet the Barons (1933)
Oil for the Lamps of China (1935)

Approved name in profiles
It Happened in Hollywood (1937) : William B. Davidson
In Society (1944): William B. Davidson
The Great Mans Lady (1937): William B. Davidson

My Love Came Back (1940): William Davidson
My Wild Rose (1947): William Davidson
Dangerous (1935): William Davidson
The Dragon Murder Case (1934): William Davidson
Smashing the Money Ring (1939): William Davidson


Based on the above confirmations, with 2 unconfirmed titles left and considering  the approved  names in the profiles, William Davidson is in majority so  the common name for this actor is finaly established as William Davidson.

As there are more William Davidsons in te Main DB (actor and producer) a Birth Year (1888) is neccesary.
See "pinned" List of Accepted Birth Years with Documentation Thread page 189 post 5 here


Greetings,
John