There's several approaches to naming images. Besides using "untitled" which basically leaves the viewer responsible for figuring out the meaning and contents of the image in its entirety, titles can roughly fall in 2 categories:
Category 1 are factual descriptions of the subject. In my work, a typical factual title for one of my landscapes would be "Horseshoe Bend, Page, Arizona". Basically, the title describes the location. It does not specifiy the meaning of the piece.
Category 2 are titles that point to a specific meaning or source of inspiration. A typical title for category 2 titles, also in my work, would be "Majestic Sweep of the Colorado River" also referring to the Horseshoe Bend. Here the exact location is not indicated. Instead, the artist's vision for this image is revealed.
Category 2 titles tend to be more more about the artist and less about the subject or location. They also influence and shape the audience's approach to the image more than factual titles.
Category 2 titles can feature religious or spiritual references. Category 2 titles can also be worded so as to be more or less revealing of the artist's intent and vision. These can go from fully revealing titles to titles that subtly point (sorry for splitting the infinitive) to a possible meaning. In this sense, we could work out sub-categories for Category 2 such as Category 2-A, 2B and so on.
I personally use category 1 titles most of the time, usually placing the name of the geological feature first (Horseshoe Bend in this instance), then the location (Page), then the state (AZ). If I indicate the season then it would come after the name of the feature (Horseshoe Bend Summer).
I use category 2 titles more rarely, and mostly for those images that are less about a location and more about an idea, or a concept. For example, In one of my series of Petroglyph photographs (Native American carvings on rocks) I titled one of the images "What I saw in the Cave". The idea being that I did not want to impose a meaning onto the petroglyph, and I did not want to have a series of images in which repeatitive titles such as "petroglyph 1," "Petroglyph 2," and so on are used.
Those are some thoughts on naming as they come to me this Saturday morning.