A collection of umbrellas is often referred to as a "parasol" or "umbrella stand" when stored together. In a more whimsical context, you might call it a "gathering of umbrellas." However, there is no widely recognized specific term for a group of umbrellas.
umbrellas
There are a few different websites that offer wholesale prices on patio umbrellas. One of the websites is called Wholesale Umbrellas, you could also check Ebay.
A website called PatioFurnitureUSA.com has patio umbrellas on sale up to 30% off regular prices. They have aluminum umbrellas, wood umbrellas, fiberglass umbrellas made of good quality materials. Their customer ratings are good, and shipping costs are kept to a minimum.
Try brolliologist
Yes, but they were called parasols.
No they don't have umbrellas.
Yes, they had umbrellas.
At collection of stamps is refered to as a stamp collection. They are frequently kept in albums. Philately is the name for the study and collection of stamps.
The plural of "umbrella" is "umbrellas."
Umbrellas or 'brollies'.
it is called a range of mountains
a collection of fish is called a school of fish