trainbearer

An attendant who holds up the train of a robe or gown, as in a procession.

One who holds up the train of a robe; especially, such a person appointed to attend on the sovereign or some high official on an occasion of ceremony.

One who holds up a train, as of a robe.

One who holds up a train, as of a robe.

one who holds up the train of a gown or robe on a ceremonial occasion