All 6 Uses

Holland
in
The Mill on the Floss
(Edited)

It required nearly a fortnight for fine instinct to assure itself of these inspirations; indeed, it was a whole week before Stephen's letter came, telling his father the facts, and adding that he was gone across to Holland,—had drawn upon the agent at Mudport for money,—was incapable of any resolution at present.
Chpt 7.2

Holland = Informal reference to the Netherlands (confusion arises because important provinces in the Netherlands are North Holland and South Holland).
He was come back from Holland; he was at Mudport again, unknown to any of his friends, and had written to her from that place, enclosing the letter to a person whom he trusted in St. Ogg's.
Chpt 7.5 *

Uses with a meaning too rare to warrant foucs:

They aren't the best sheets, but they're good enough for anybody to sleep in, be he who he will; for as for them best Holland sheets, I should repent buying 'em, only they'll do to lay us out in.
Chpt 1.2 *

holland = a type of strong, plain-weave linen fabric
If Mr. Tulliver had been a susceptible man in his conjugal relation, he might have supposed that she drew out the key to aid her imagination in anticipating the moment when he would be in a state to justify the production of the best Holland sheets.
Chpt 1.2
Already, at twelve o'clock, Mrs. Tulliver had on her visiting costume, with a protective apparatus of brown holland, as if she had been a piece of satin furniture in danger of flies; Maggie was frowning and twisting her shoulders, that she might if possible shrink away from the prickliest of tuckers, while her mother was remonstrating, "Don't, Maggie, my dear; don't make yourself so ugly!" and Tom's cheeks were looking particularly brilliant as a relief to hi
Chpt 1.9
And as for the linen, I shall look out what's serviceable, to make a present of to my nephey; I've got cloth as has never been whitened, better worth having than other people's fine holland; and I hope he'll lie down in it and think of his aunt.
Chpt 6.12

Definitions:

(1) (Holland)
Informal reference to the Netherlands (confusion arises because important provinces in the Netherlands are North Holland and South Holland).
(2) (meaning too rare to warrant focus)
Less commonly, Holland can refer to a person's name.