Mindful of (to be) - Vine's Expository Dictionary of New Testament Words
Mindful of (to be)
[ 1,,G5403, mimnesko ]the tenses of which are from the older verb mnaomai, signifies to remind;" but in the Middle Voice, "to remember, to be mindful of," in the sense of caring for, e.g., Hebrews 2:6, "Thou art mindful;" in Hebrews 13:3, "remember;" in 2 Timothy 1:4, RV, "remembering" (AV, "being mindful of"); so in 2 Peter 3:2. See REMEMBER.
[ 2,,G3421, mnemoneuo ]
"to call to mind, remember," is rendered "they had been mindful" in Hebrews 11:15. See MENTION, B, REMEMBER.