The following points should be understood when giving names to ethers.

1. Recognise that the molecule is an ether by its general form-
R₁-O-R₂ 

2. Identify the componenets labelled "R₁" and "R₂" here.
For this use the standard system of labelling carbon chains as for alkanes.

3. According to the standard system for naming ethers, the shorter of the two chains "R₁" and "R₂" should be the first part of the name with the "-ane" suffixand that applies to the corresponding alkane changed to -oxy, and the name of the longer alkane chain forming the suffix of the name of the ether.

Exmaple, CH₃OCH₂CH₃ is methoxyethane and not ethoxymethane.

CH₃-O-CH₃ - methoxy methane

CH₃-O-C₂H₅ - methoxy ethane, and so on.