Samuel Welo was an American advertising  calligrapher, typographer, designer and lettering artist whose work appeared in the 1920s. 
Based on his lettering, several typefaces have seen the light of day. A partial list: 
 
-  P22 Art Deco Chic (2002, James Grieshaber).  
-  Hamilton (David Nalle, Scriptorium, 1993): a tall, bold display font typical of art nouveau poster lettering and turn-of-the-century advertising design.  
-  Plakat (David Nalle, Scriptorium, 1993):  a rough-edged curly decorative poster face.  
-  Melcheburn  (David Nalle, Scriptorium, 1993): a blackletter face.  
-  Samuello (Iza W, Intellecta Design, 2007). This type family comes in five styles.  
-  Mohair Sam (2005, Nick Curtis): the upper case is based on Welo's letters, but the lower case on ATF's Romany Script.  
-  Pyriform Tones (2007, Nick Curtis): first done by Welo in 1925. 
- Welo Script (Font Bureau, 1998): a custom design by FB for Martha Stewart Living Magazine (page disappeared). 
-  Ekberg (David Nalle). 
- Fireside Chat NF (2003, Nick Curtis). 
- ITC Photoplay (2002, Nick Curtis): based on lettering from 1927 by Samuel Welo, intended originally for captions of silent movies. It was in Studio Handbook for Artists and Advertisers (1927). 
- Grenadier NF (Nick Curtis) is based on Samuel Welo's Modernistic. 
- Souci Sans (Nick Curtis) is based on a type design shown in Lettering Modern and Foreign (1930). 
- Blue Plate Special (Nick Curtis) is a font family based on a design by Welo shown in Studio Handbook for Artists and Advertisers (1927). 
- Herald Square NF (Nick Curtis) is a font family based on a design by Welo shown in Studio Handbook for Artists and Advertisers (1927). 
- Magic Lantern NF (Nick Curtis) is a font family based on a design by Welo shown in Studio Handbook for Artists and Advertisers (1927). 
- Speedball No 1 NF and Speedball No 2  NF (Nick Curtis) are font families based on a design by Welo shown in Studio Handbook for Artists and Advertisers (1927). 
- Washington Square NF (Nick Curtis)  is a font based on a design by Welo shown in Studio Handbook for Artists and Advertisers (1927). 
- Whoopie Cushion SW (Nick Curtis) is a font family based on a design by Welo shown in Studio Handbook for Artists and Advertisers (1931). 
- Mustang Sally and Tugboat Annie (Nick Curtis)  are fonts based on a design by Welo shown in Studio Handbook for Artists and Advertisers (1931).
Other alphabet designs: (unnamed, 1928), (unnamed, 1928), Modernistic (1932; I suspect that this was used as a basis foir Samuello by Intellecta Design).
Books by Welo: 
 
- Lettering: Modern and Foreign (1930, Chicago: Frederick J. Drake and Company). 
- Practical lettering, modern and foreign (1946).  
- Studio Handbook Letter & Design for Artists and Advertisers (1927).  
- Trademark and Monogram Suggestions (1937).  
Gene Gable
scanned many pages of Studio Handbook Letter & Design for Artists and Advertisers (1927, Samuel Welo). this book has 233 pages and is entirely hand-lettered!
This page has a copy of these scans, but please visit Gable's page for
discussion and links to other articles by him.