Your business name should tell potential customers what your business is. Some of your suggestions do not do that such as In a Pear Tree. You need to expand it to make it clear what you are offering for example Pear Tree Decor and Designs or Pear Tree Home Crafts
Pear Tree Boutique sounds very cute and professional,In a pear tree would be better for a kids storepear tree creations is not very catchy but alrightpear tree designs is again very blunt my fave is pear tree boutique also try pear tree Home