Each Emacs frame always has a title, which appears in window
decorations and icons as the name of the frame. The default title is
of the form ‘
[email protected]’ (if there is
only one frame) or shows the selected window’s buffer name (if there
is more than one frame).
You can specify a non-default title for the initial Emacs frame with a command line option:
title as the title for the initial Emacs frame.
--name’ option (see Resources) also specifies the title
for the initial Emacs frame.