Matthew Poole and continuators on James 2:7

7 Do not they blaspheme that worthy name by which ye are called ?

If the Rich here spoken of, were Christians; then they may be said to Blaspheme Christ's Name, when by their wicked carriage they caused it to be blasphemed by others, unbelievers among whom they were, Rom. 2.24. Tit. 2.5. &c. 1 Tim. 6.1. but if rich Unbelievers be here meant, the rich Men of those times being generally great Enemies to Christianity; he would from thence shew how mean a consideration Riches were, to incline the Professors of Religion to such partiality as he taxeth them for.

Or, good or honourable (as good place, v. 3. for honourable) Name of Christ; they blaspheme what they should adore.

Or, which is called upon you, either, which was called upon over you, when you were baptised into it, or rather it is an Hebrew phrase, and implies no more than (as we read it) their being called by it, as Children are after their Fathers, and Wives after their Husbands, Gen. 48.16. Isa. 4.1. For so God's People are called by his Name, Deut. 28.10. Eph. 3.15.