I haven't found list of brands on the web (except some few on shops). I also have a poor memory. So I created this list and pics (1 front, 2 rear). Sorted by easiest features. I will make more lists later. (click to enlarge). Also useful when labels removed.
Front:
Liberty: Green zipper and green square or triangle, white squared label below. Pocket with lid/flap. 1 button. Examples: Cedarmont Kids She'll be..., Renfroe's White Christmas. Hee Haw
Key: Green diagonal \ bar, left bib pocket with lid. Examples: The Waltons (Erin, Mary Ellen). Different kid style? in Wish You Well.
Pointer: Red zipper (also N&w), white squared label mid low. Dog facing left.
Big Smith: 2 vertical holes above bib pocket, Usually 2 buttons, medium blue, earlier dark blue label on lower right. Examples: Honkytonk Man, Where the Red Fern Grows 1974
Carhartt: Pointed bib pocket. 2 buttons, white label on far right, bold C. Examples: Sugar Creek Gang (Poetry)
Dickies: Red label (later white) above bib pocket mid right. 2 buttons, vertical hole above pocket on left, \ hole mid low. Examples: Dinosaur Hunter.
Washington Dee Cee: 1 button, lid, golden/black label mid. Examples: Huck & the King of Hearts.
Calvin Klein: 2 bib pockets, outer one pointed, between white label. Examples: Sugar Creek Gang.
JC Penney (Big Mac): Red vertical seams on top of bib pocket. \ hole above bib on right. 2 buttons. White label on mid right. vertical hole mid. Examples: Clay Farmers (1st brand found).
Sears: \ hole above bib on right. 2 buttons. - hole upper mid. White label on mid right. Example: Secondhand Lions
Montgomery Ward (Pioneer): Lid on left. \ hole above pocket on left. White label on mid right.
Round House: 1 vertical hole on mid right above pocket. 2 buttons. White label on mid right. Red House. Example: John John in the Sky.
OshKosh: Label on lower right or center, usually dark blue . 2 buttons. 1 vertical hole on right. 1 - hole mid upper. Examples: Lockie Leonard
Lee: 1 vertical hole on mid left. White small stich / on bib mid, white vertical seams on top of pocket. White label on mid right. Examples: Bristle Face, Waltons (Jason)
N&W: 1 button lid. (or (red) zipper) White or blue label on mid left. Examples: Where the Red Fern Groes 2003.
Tommy Hilfiger: 1 or 0 buttons, Large label white/red, blue top, bottom. Example: Enic Blyton Secret Series.
Old Navy: 0 buttons. 2 bib pockets front pointed, hole / on right. Example: The Arctic Camels.
Unpictured:
Jack Rabbit: Lid on left. vertical hole on left. White label on mid right.
Guess: Small label on pocket, no buttons. Example: Kidsongs
GAP: No button (or one button with small flap), tag with logo inside. Example: L'instit s7e3
Grandwish: No buttons, no tags. Example: Coco Ferme
Berne: (different styles) 1 button, (zipper). Example Wish You Well (younger boy)
Pic 2
Headlight (tag very low) also with red seams,
Casey Jones (tag left),
Can't Bust 'Em (usually golden seams) also white (Ben The Waltons),
Big Ben Wrangler (tag left, but lower as Casey Jones),
Hawk (tag above bib), 2 pockets,
Something (Edwin) one button, tag high,
Guess (squared pocket, tag at top, also diagonal),
Blue Bell Wrangler, red seams,
Old Kentucky,
Finck's (Red Bar)
Sweet Orr (tag above pocket)
Free-Land (squared pocket)
Stronghold (tag above pocket right), Example Elizabeth in The Waltons season 6
Red Kap (round pocket, 1 button, green hole),
Boss of the Road (squared pocket),
Crown / Headlight (tag very low, seams)
Pic 3
10 Ounce / Red White Blue
Sledges
Drum Major
Big John
Finck's
Hercules
Phillips-Lester 401
Rugged 70s
Orslow
Levi's (20s)
Bubba Brand
Fly's
Blue Bell
Key (older)
Big Dad
Red Camel
Pine Tree
Workn' Sport 80s ?
" zipper 70s
Super Big Mac
Rear: pic below
OshKosh: Triangle pointing down.
Big Smith: Long triangle pointing up. below medium or earlier dark blue label.
Calvin Klein: very long diamond, 4 edges. straps / \. Label inside.
JC Penney: "Square Bak" squared seams, squared white logo in middle.
Lee: White Label on top. diamond 4 edges.
Wrangler Big Ben: triangle pointing down, red small label
Tommy Hilfiger: long diamond 6 edges round below. Straps / \
Dickies: Square back, red rectangular label upper half.
Levis: long diamond 6 edges round below. Straps / \, right back pocket
Washington Dee Cee: triangle pointing down, golden black label
Casey Jones: long diamond 6 edges round below. Straps / \
Montgomery Ward: diamond 4 edges
Carhartt: similar like Tommy Hilfiger and Levis
Sears: similar like Tommy Hilfiger, Carhartt and Levis
Guess: Triangle on rear pocket, belt loops . Examples: Kidsongs
Brand 4: Patched Washington Dee Cee+ Big Smith rear
Brand 8: Unknown Levi's? Two Horse, update
Brand 9: Unknown and Washington Dee Cee?
Brand 10: Boss of the Road?, Lee (To Kill A Mockingbird)
Brand 11: Kidsongs: Guess (and hickory OshKosh, Liberty, Lee, Unknown with half flap)
Brand 12: Several (Carhartt, Lee, Dickies, OshKosh, Washington Dee Cee)
Unknown and Lee (hickory striped) Knokken for Twee (NL)
Brand 13: Unknown Dutch Briefgeheim (hickory striped)
Vintage clothing tags, blog, forum
Brand 14: The Waltons: Lee, Key, Can't Bust 'Em, Washington Dee Cee, Test, Brand 15 JC Penney, Headlight?, Whitefield, Test, Dee Cee. Brand 19: Lee. Brand 20: Can't Bust 'Em. Brand 21: JC Penny, OshKosh, Brand 22: Lee, OshKosh? Waltons seasons 3-9 Brand 23- later seasons also linked in Brand 14. John-Boy liberty striped Sweet Orr or Hercules (season 4). Elizabeth in Stronghold (season 6).
Brand 16: Wind at My Back: Dickies, Carhartt (f/m), others, Calvin Klein
Brand 17: Barney & Friends: Big Smith. Bunk'd: Zara, H&M, others
Brand 18: Wish You Well: Key (different style), Big John?
Brand+update: Gacy (painters bibs) Dickies, Carhartt, unknown 50s
Brand 28: L'instit s7e3, Coco Ferme etc GAP, Grandwish
List of all brands A-Z
Lee models and types of stripes