Script that can be pasted into GIMP's Python-Fu console to generate multiple files with names from the array.

gimp_script.py

names = [
  "Ada Lovelace",
  "John Smith",
  "Sam Kowalski"
]

original_image = gimp.image_list()[0]

for name in names:
    first_name, last_name = name.split(" ")
    text_layer_string = first_name + "\n" + last_name
    filename = "{}-{}.png".format(first_name.lower(), last_name.lower())
    image = pdb.gimp_image_duplicate(original_image)
    text_layer = pdb.gimp_image_get_layer_by_name(image, "Name")
    pdb.gimp_text_layer_set_text(text_layer, text_layer_string)
    pdb.gimp_text_layer_set_font_size(text_layer, 72, 0)
    pdb.gimp_text_layer_set_font(text_layer, "Helvetica Neue Light")
    merged_layer = pdb.gimp_image_merge_visible_layers(image, 1)
    pdb.file_png_save_defaults(image, merged_layer, "/Users/tomaszj/Documents/gimp-output/" + filename, filename)
    pdb.gimp_image_delete(image)