I respect Bear Bio's judgement, but our taste in Randalls differs somewhat. I'd opt for their Model 7 with 4.5 or five-inch blade. I'd order the optional black Micarta handle and the alloy butt cap, drilled for a wrist thong. And I'd pay the difference for the stainless blade option.
As he later posted, Nordic Knives is one dealer who sells Randall knives from stock. You do pay a premium for avoiding the long waiting period if you order from the maker.
One man mentioned the Grohmann knives from Nova Scotia. Either their Boat Knife or the famous Russell-designed Canadian hunter will suit the need, if you don't mind the lack of a guard. I have both and the larger No. 4 survival knife. Be advised that the Boat Knife has been issued as a utility knife to Canadian paratroopers, in a special flap sheath, which they also sell to civilians. The RCAF has issued the No. 4 as part of the survival supplies on their planes that may go down in the wild. I don't know if they issue them to individual pilots in single-seat fighters.
Ooops. Already named a foreign maker. Gonna do it again, to let you get a better knife.
Fallkniven
www.fallkniven,com knives are designed in Sweden, by a man with very extensive hunting and fishing experience. They are made by premium grade shops in Japan, of excellent materials, with sheaths far above the norm for factory knives. You pay for what you get, but you do get it. Look at their Model F-1, which is the issued pilot survival knife to the Royal Swedish Air Force. Look also at their superb S-1 as an all-round outdoors knife. Their other offerings are larger than you seem to want.
The basic handles on these are either Kraton or Thermorun, for a secure grasp. But the F-1 offers handle options, including Micarta. Their Northern Lights line uses leather handles with fiber trim and are staunchly reminiscent of Randall's leather handles. Butt caps are Duralumin, drilled for a thong.
They also sell some elegant folding knives, but I don't suggest a folder in this role. Apart from lesser strength, a folder has joints that collect fish slime and fruit juice, etc. But if you also want a good pocketknife, look at what they sell. I have a U-2, which is very light in the pocket and which is sharp enough to define the word, "sharp"!
You should realize that Fallkniven products carry the Royal Warrant of the King of Sweden: they're suppliers of sporting knives to His Majesty, who in fact does hunt and fish. And his AF uses the F-1!
Finally, you can look for a good Puma Hunter's Pal at knife shows or Online. I think they still have US dealers, but it's generally accepted that Puma has lost quality since the Lauterjung family sold the firm in the mid-1990's. They had owned the brand since founding it in 1769! I think this is exaggerated, but it is true that the current Hunter's Pal has just two handle pins in bushings, where the older one has three. A production shortcut, but not a vital one. IF you inspect the knife and the stag scales are of proper size and are pretty enough, the Hunter's Pal is a superb little knife, with about a four-inch blade, grooved on top to avoid slippages. If you want a vintage Puma knife, pay the money now. Collectors are driving prices up. The Puma Outdoor model is also excellent and has a fancy version, the Model 3589. But those have five-inch blades and are general-use outdoors knives, not so much for smaller trout and small game. Model 3589 is truly elegant, with a silver inlay for your initial.
Apart from Randall (very expensive), the other US-made brand that I recommend is Buck, the traditional classic line of which is still made here, now in Idaho. They left El Cajon, CA some years ago. I prefer the Model 105 in a lighter knife. It's also called the Pathfinder model, and has a five-inch blade. I find their little Model 102 Woodsman too small for my hands and my taste. I'd pay the considerable difference for the Puma Hunter's Pal if I wanted a four-inch blade. But the Buck Model 105 is what I suggest to any outdoorsman who doesn't know which basic knife he wants. It offers high quality for a modest cost and can be found even in some Wal-Mart stores. Take care of it and your grandchildren can use it. If you like it, buy a spare, although I think they'll keep making it.
One major advantage of buying Buck is that if you need to refinish the knife or have the blade re-honed at the factory, they are in this country, offer a fast turnaround time, and don't charge much. They stand behind their product, too. Unlike some companies, they have a long history and are very well respected.
I like elegance in a knife as well as utility. The above choices will provide pride in ownership and deep emotional satisfaction.
How large are your trout? Which animals will you hunt? Don't get something too small. And carry a good hatchet, too.