Adam Clarke on Ephesians 1:16

Cease not to give thanks - The apostle intimates, so fully satisfied was he of the genuineness of their conversion, and of their steadiness since their conversion, that it was to him a continual cause of thanksgiving to God, who had brought them into that state of salvation; and of prayer, that they might be preserved blameless to the end.

Making mention of you - While praying for the prosperity of the Christian cause generally, he was led, from his particular affection for them, to mention them by name before God.