はもとより details
let alone; to say nothing of
この公園は子どもはもとより、お年寄りにも人気がある。
kono kouen wa kodomo wa motoyori, otoshiyori ni mo ninki ga aru.
This park is popular with children, of course, and with older people too. neutral
地元の人はもとより、遠方からの観光客にも知られている。
jimoto no hito wa motoyori, enpou kara no kankoukyaku ni mo shirarete iru.
It is known to locals, naturally, and to tourists from far away as well. neutral
Examples
X goes without saying, and Y holds too — X is offered as already granted, Y as the news
この公園は子どもはもとより、お年寄りにも人気がある。
kono kouen wa kodomo wa motoyori, otoshiyori ni mo ninki ga aru.
This park is popular with children, of course, and with older people too. neutral
地元の人はもとより、遠方からの観光客にも知られている。
jimoto no hito wa motoyori, enpou kara no kankoukyaku ni mo shirarete iru.
It is known to locals, naturally, and to tourists from far away as well. neutral
会員の皆様はもとより、一般の方もご参加いただけます。
kaiin no minasama wa motoyori, ippan no kata mo go sanka itadakemasu.
Members are welcome as a matter of course, and so are members of the public. formal
Formation
{N}はもとよりattaches to noun
Related patterns
Similar
はもとより presents X as too obvious to argue and hangs off a noun only; のみならず makes no such appeal to the obvious and takes whole clauses as readily as nouns — which is why reports reach for のみならず and blurbs for はもとより.
はもとより opens by conceding X as too obvious to argue over before adding Y as the real news; に限らず makes no such concession about X's obviousness — it only denies that X marks the boundary of what applies.
Lookalikes
The より here is the classical ablative frozen inside もとより, not the comparative — 子どもはもとより ranks nothing against anything, where 子どもより低い measures one thing against another.